考试试题

[多选题]共用题干 第二篇The IcemanOn a September day in 1991,two Germans were climbing the mountains between Austria and Italy. High up on a mountain pass,they found the body of a man lying on the ice.At that height(10,499 feet,or 3,200 meters),the ice is usually permanent,but 1991 had been an especially warm year. The mountain ice had melted more than usual and so the body had come to the surface.It was lying face downward. The skeleton(骨架)was in perfect condition , except for a wound in the head.There was still skin on the bones and the remains of some clothes.The hands were still holding the wooden handle of an ax and on the feet there were very simple leather and cloth boots.Nearby was a pair of gloves made of tree bark(树皮)and a holder for arrows.Who was the man?How and when had he died?Everybody had a different answer to these questions. Some people thought that it was from this century,perhaps the body of a soldier who died in World War Ⅰ, since several soldiers had already been found in the area.A Swiss woman believed it might be her father,who had died in those mountains twenty years before and whose body had never been found.The scientists who rushed to look at the body thought it was probably much older,maybe even a thousand years old.With modem dating techniques,the. scientists soon leamed that the iceman was about 5,300 years old. Bom in about 3300 B.C.,he lived during the Bronze Age in Europe.At first scientists thought he was proba- bly a hunter who had died in an accident in the high mountains.More recent evidence,however,tells a differ- ent story.A new kind of X-ray shows an arrowhead still stuck in his shoulder. It left only a tiny hole in his skin,but it caused internal damage and bleeding. He almost certainly died from this wound,and not from the wound on the back of his head.This means that he was probably in some kind of a battle.It might have been part of a larger war,or he might have been fighting bandits. He might even have been a bandit himself.By studying his clothes and tools,scientists have already leamed a great deal from the iceman about the times he lived in.we may never know the full story of how he died,but he has given us important clues to the history of those distant times. All the following are assumptions once made about the iceman EXCEPT__________.
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(54)
[多选题]共用题干 Musical Training Can Improve Communication SkillsAmerican scientists say musical training seems to improve communication skills and language retardation (延迟).They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello(大提琴).Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______(64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better. _________59
[多选题]共用题干 Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel(矿物燃 料),meaning that it is derived from organic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane(甲烷).2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity. In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of newelectricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits(发出)less pollution than other fossil fuels sources. When natural gas is burned,it produces mostly carbon dioxide(二氧化碳)and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)一making natural gas the clea-- nest burning fossil fuel of all.4 The United States consumes about one-third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts thatnatural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG(液化天然气)has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import-ers of LNG are Japan,Korea,France and Spain. Paragraph 5______________
[多选题]共用题干 SemcoAt 21,Ricardo Semler became boss of his father's business in Brazil,Semco,which sold parts for ships. Semler Junior worked like a madman,from 7:30 a. m.until midnight every day.One afternoon,while touring a factory in New York,he collapsed.The doctor who treated him said,"There's nothing wrong with you.But if you continue like this,you'll find a new home in our hospital." Semler got the message.He changed the way he worked.In fact,he changed the way his employees worked too.He let his workers take more responsibility so that they would be the ones worrying when things went wrong. He allowed them to set their own salaries,and he cut all the jobs he thought were unnecessary,like re-- ceptionists and secretaries._______________ (46)"Everyone at Semco,even top managers,meets guests in recep- tion,does the photocopying,sends faxes,types letters and dials the phone."He completely reorganized the office:instead of walls,they have plants at Semco,so bosses can't shut themselves away from everyone else._______________ (47)As for uniforms,some people wear suits and others wear T-shirts.Semler says,"We have a sales manager named Rubin Agater who sits there reading the newspaper hour after hour. He doesn't even pretend to be busy.But when a Semco pump on the other side of the world fails and millions of gallons of oil are about to spill into the sea,Rubin springs into action.______________(48) That's when he earns his salary. No one cares if he doesn't look busy the rest of the time."Semco has flexible working hours;the employees decide when they need to arrive at work.The employees also evaluate their bosses twice a year.______________ (49)It sounds perfect,but does it work?The answer is in the numbers:in the last six years,Semco's revenues have gone from$35 million to $212 million.The company has grown from eight hundred employees to 3,000.Why?Semler says it's because of"peer pressure".Peer pressure makes employees work hard for everyone else._______________ (50)In other words,Ricardo Semler treats his workers like adults and expects them to act like adults.And they do. __________(46)
[多选题]共用题干 The iPad1 The iPad is a tablet computer(平板电脑)designed and developed by Apple. It is particularly mar- keted as a platform for audio and visual media such as books,periodicals,movies,music,and games,as well as web content.At about 1.5 pounds(680 grams),its size and weight are between those of most contempora- ry smartphones and laptop computers.Apple released the iPad in April 2010,and sold 3 million of the de- vices in 80 days.2 The iPad runs the same operating system as iPod Touch and iPhone.It can run its own applications as well as ones developed for iPhone.Without modification,it will only run programs approved by Apple and distributed via its online store.3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most pre- vious tablet computers , which uses a pressure-triggered stylus(触控笔).The iPad uses a Wi-Fi data connec- tion to browse(浏览)the Internet, load and stream media ,and install software. Some models also have a 3G wireless data connection which can connect to GSM 3 G data networks.The device is managed and synchro- nized by iTunes on a personal computer via USB cable.4 An iPad has different features and applications one can use to execute different and interesting things.There are lots of iPad applications that the owner can use to enhance the way they communicate.Some of these are how to use social networking sites and other online options.One of the most common uses is for e-mail services.iPad applications like Markdown Mail allow the adoption of specific and particular options. They enable the owner to personalize their email accounts.5 While the iPad is mostly used by consumers it also has been taken up by business users.Some com- panies are adopting iPads in their business offices by distributing or making available iPads to employees.Ex- amples of uses in the workplace include lawyers responding to clients,medical professionals accessing health records during patient exams,and managers approving employee requests.A survey by Frost&Sullivan shows that iPad usage in workplaces is linked to the goals of increased employee productivity,reduced paperwork,and increased revenue. Paragraph 3__________
[多选题]共用题干 Musical Training Can Improve Communication SkillsAmerican scientists say musical training seems to improve communication skills and language retardation (延迟).They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello(大提琴).Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______(64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better. _________58
[多选题]共用题干 第一篇Walking to Exercise the BrainDo you think sitting and studying all the time will improve your grades?Think again.Getting some exer-cise may help,too.New research with old people suggests that taking regular walks helps them pay attention better than if they didn't exercise.Previous research had shown that mice learn,remember,and pay attention better after a few weeks of working out on a running wheel.Mice that exercise have greater blood flow to the brain than those who don't. Their brain cells also make more connections.Neuroscientists(神经科学家)from the University of Illinois at Urbana Champaign wanted to find out if the same thing is true for people.First,they measured the physical fitness of 41 adults,ages 58 to 77,after each person walked 1 mile.Then,participants looked at arrows on a computer screen and had to use computer keys to show which way one particular arrow was pointing.Adults who were physically fit were faster at the arrow task,and their answers were just as accurate as their less-fit peers,the researchers found.The fitter participants also had more blood flow to a part of theirbrain responsible for paying attention and making decisions.In a second study , 15 elderly people who completed a 6-month aerobic-training(有氧运动)course were faster at attention tasks compared with 14 seniors who just did stretching and toning exercises(韵律操)for the same amount of time.So,even going for a walk every 2 or 3 days for just 10 to 45 minutes can help.That should be good news for the elderly.The effects of exercising on the brains of younger people haven't been studied yet. Still,it can't hurt to take occasional breaks and go for a walk or run around with friends.Whatever you do,though,don't try to read and walk at the same time.You could end up hurting yourself! After taking exercise for a few weeks,the mice were found to have______________
[单选题]Power Napping is Good f the I.Q.Today we hear me me about the imptance of getting enoughsleep—about eight hours a night. Sleep can help heal give energy toboth the body the brain. ____1____ It seems almost certain that the thirdof our lives that we spend asleep has a great effect on the two-thirds that weare awake. Sleep affects our emotions, memy, focus, behavi.Studies show that people in developed countries spend less timeasleep me time at wk commuting. Dr. Karine Spiegel, at theUniversity of Chicago, has found that the average length of sleep has gone downfrom nine hours a night in 1910 to seven--a-half hours a night today.However, our bodies cannot function well without enough sleep. ____2____Accding to Canadian scientist Dr. Stanley Cen, every hour of lost sleep at nightcauses us to lose one I.Q. point the next day. F example, when someone getsonly five six hours of sleep each night f a week, the person’s I.Q. couldgo down 15 points me. ____3____Most sleep experts say that humans need at least eight hours ofsleep every day, but it should be in two stages: a long sleep at night ashter nap in the afternoon. Some companies help their employees follow thisadvice. ____4____ They say this makes the wkers much me efficient.To study sleep deprivation (not getting enough sleep), scientistsuse a test called the Multiple Sleep Latency Test (MSLT). During the test, aperson stays in a darkened, quiet room during the daytime. Scientists believethat a sleep-deprived person will fall asleep quickly. If it takes ten minutes longer to fall asleep, the person is probably getting enough sleep.Scientists have also found that the time of year seems to affect howmuch sleep we need. ____5____ However, in the summer, people sometimes sleep aslittle as six hours, without having any problems.  词汇:emotion n. 情绪commuting n. 乘公交车上下班,通勤I.Q. n. 智商(全称为intelligent quotient)deprivation n. 剥夺,匮乏Sleep Latency Test n. 睡眠潜伏期  注释:1.have/has an effect on... 对……有效果的2.go down from... to...从………降至……  练习:
[多选题]共用题干 The Case of the Disappearing FingerprintsOne useful anti-cancer drug can effectively erase the whorls(箩状指纹)and other characteristic marks that give people their distinctive fingerprints(指纹).Losing them could become troublesome. A case______________ (51) online in a letter by Annals of Oncology(肿瘤学)indicates how big a ______________ (52) losing fingerprints is.Eng-Huat Tan,a Singapore-based medical doctor describes a 62-year-old man who has usedcapecitabine(卡培他滨)to______________ ( 53 ) his nasopharyngeal cancer(鼻咽癌).After three years on the_______________ (54),the patient decided to visit his U.S.relatives last December. But he was stopped by U. S. customs officials_______________(55)4 hours after entering the country when those officials couldn't get finger- prints from the man. There were no ___________( 56 ) swirly(旋涡状的)marks appearing from his index finger."U.S.customs has been fingerprinting incoming foreign visitors for years,"Tan says."Unfortunately,forthe Singaporean traveler,one potential ______________ (57)effect of his drug treatment is a smoothing of the tis-sue on the finger pads. ______________ (58)no fingerprints.""It is uncertain when fingerprint ______________ (59)will begin to take place in patients who are takingcapecitabine,"Tan points out.So he______________ (60)any physicians who prescribe the drug to provide theirpatients with a doctor's______________ (61)pointing out that their medicine may cause fingerprints to disap-pear.Eventually,the Singapore traveler made it into the United States.But he's also now got the doctor's ex-planatory note一and won't leave home______________ (62)it.By the way, maybe the Food and Drug Administration(美国食品药物管理局),________ (63) approved use of the drug 11 years ago,should consider updating its list of side effects_______________ (64)with this medicine. The current list does note that patients may experience vomiting(呕吐),stomach pain and some other side effects.But no where_______________ (65)it mention the potential for loss of fingerprints. _________(52)
[多选题]共用题干 I Know Just How You FeelDo you feel sad?Happy?Frustrated?Insouciant?Exonerated?Infuriated?Do you think that the way you display these emotions is unique?Well,think again.Even the expression of the most personal feelings can be divided into groups,classified,and perhaps,taught. This week sees the publication of Mind Reading, an interactive DVD displaying every possible human emotion.It demonstrates 412 distinct ways in which we feel:the first visual dictionary of the human heart.The attempt to classify expressions began with Darwin.His The Expression of the Emotions in Man and Animals,published in 1872,divided the emotions into six types一anger,fear,sadness,disgust,surprise and enjoyment.__________(46)Every other feeling,of which there may be thousands,was thought to derive from Darwin's small group.More complex expressions of emotion were likely to be learned and therefore more specific to each culture.But now it is believed that,whereas gestures do not cross cultural boundaries well,many more facial ex-pressions than Darwin's half-dozen are shared worldwide.________(47)The Mind Reading DVD is a systematic visual record of each of these expressions being acted out.The project was conceived by Professor Simon Baron-Cohen of the autism(孤独症)research centre in Cambridge as an aid for people with autism,who has difficulty both reading and expressing emotions.But it quickly became apparent that it had broader uses.Novelists,actors and portrait painters,for example,all need to understand a wide range of emotional expression,and teachers could use it for classes in personal and so- cial development. Baron-Cohen's team first had to decide what counted as an emotion._________( 48) Using this definition,1,5 12 emotion terms were identified and put to a panel who had to decide if each repre- sented a separate emotion,or if they were synonyms.This list was whittled down to 412,arranged in 24 groups from"afraid"to"wanting".Once the emotions were defined and classified,a DVD seemed the clearest and most efficient way to dis- play them.In Mind Reading,each expression is acted out一six times,by six different actors一in three seconds. _________(49)The explanation for this is simple:we may find it difficult to describe emotions usingwords,but we instantly recognize one when we see it on someone's face."It was really clear when the actors had got it right,"says Cathy Collis,who directed the DVD."Although the actors were given some direction," says Ms Collis,"they were not told which facial muscles they should move."__________(50)For example, when someone feels contempt,you can't say for certain that their eyebrows always go down.Someone who has tried to establish such rules is the American,Professor Paul Ekman,who has built a database of how the face moves for every emotion.The face can make 43 distinct muscle movements called "action units".These can be combined into more than 10,000 visible facial shapes.Ekman has written out a pattern of facial muscular movements to represent each emotion. __________(50)
[多选题]共用题干 Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel(矿物燃 料),meaning that it is derived from organic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane(甲烷).2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity. In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of newelectricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits(发出)less pollution than other fossil fuels sources. When natural gas is burned,it produces mostly carbon dioxide(二氧化碳)and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)一making natural gas the clea-- nest burning fossil fuel of all.4 The United States consumes about one-third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts thatnatural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG(液化天然气)has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import-ers of LNG are Japan,Korea,France and Spain. Paragraph 2______________
[多选题]共用题干 第一篇How the First Stars in the Universe Came into ExistenceResearchers believe that our universe began with the Big Bang(宇宙大爆炸)about 13 billion years ago,and that soon after that event,matter began to form as small dust grains and gases.How the first stars formed from this dust and gas has been a burning question for years,but a state-of-the-art computer simula- tion now offers the most detailed picture yet of how these first stars in the universe came into existence.The composition of the early universe was quite different from that of today,and the physics that governed the early universe were also somewhat simpler. Dr. Naoki Yoshida and colleagues in Japan and the U.S.incorporated these conditions of the early universe,sometimes referred to as the"cosmic dark ages",to simulate the formation of an astronomical object that would eventually shine its light into this darkness.The result is a detailed description of the formation of a protostar(原恒星)一the early stage of a mas- sive primordial(原始的)star of our universe , and the researchers ' computer simulation , which has been called a"cosmic Rosetta Stone"sets the bar for further investigation into the star formation process.The ques- tion of how the first stars evolved is so important because their formations and eventual explosions providedthe seeds for subsequent stars to come into being.According to their simulation,gravity acted on minute density variations in matter,gases,and the myste- riou;"dark matter"of the universe after the Big Bang in order to form this early stage of a star一a protostarwith a mass of just one percent of our sun. The simulation reveals how pre-stellar(前恒星的)gases would have actually evolved under the simpler physics of the early universe to form this protostar.Dr. Yoshida's simulation also shows that the protostar would likely evolve into a massive star capable ofsynthesizing(合成)heavy elements,not just in later generations of stars,but soon after the Big Bang."This general picture of star formation,and the ability to compare how stellar objects form in different time periods and regions of the universe,will eventually allow investigation into the origins of life and planets,"said Lars Herriquist,a professor of Astronomy at Harvard University and a co-author of this latest report."The abundance of elements in the universe has increased as stars have accumulated,"he says,"and the formation and destruction of stars continues to spread these elements further across the universe.So all ofthe elements in our bOdies originally formed from nuclear reactions in the centers of stars,long ago."Their simulation of the birth of a protostar in the early universe signifies a key step toward the ambitiousgoal of piecing together the formation of an entire primordial star and of predicting the mass and properties of these first stars of the universe.More powerful computers,more physical data,and an even larger range will be needed for further calculations and simulations,but these researchers hope to eventually extend this simu- lation to the point of nuclear reaction initiation一when a stellar object becomes a true star."Dr. Yoshida has taken the study of primordial star formation to a new level with this simulation,but it still gets us only to the halfway point towards our final goal.It is like laying the foundation of a skyscraper," said Volker Bromm,assistant professor of Astronomy at the University of Texas, Austin and the author of a companion article."We must continue our studies in this area to understand how the initially tiny protostar grows,layer by layer,to eventually form a massive star. But here,the physics become much more complicated and even more computational resources are needed." What does the"an astronomical object"in Paragraph 2 refer to?
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(64)
[多选题]共用题干 Obtaining Drinking Water from Air HumidityNot a plant to be seen,the desert ground is too dry.But the air contains water,and research scientistshave found a. __________(51)of obtaining drinking water from air humidity."The process we have developed is based exclusively on renewable energy sources_________(52)thermal solar collectors andphotovoltaic(光电的)cells , ________( 53 ) makes this method completely energy-autonomous. It will ____________( 54 ) function in regions where there is no electrical infrastructure(基础设施),"says Siegfried Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic(吸湿的) brine(盐水)一saline(含盐的)solution which absorbs moisture一runs down a tower-shaped unit and absorbs water from the air. It is then sucked__________(56)a tank a few meters off the ground in which a vacuum prevails.Energy from solar collectors_________(57)up the brine,which is diluted by the water it has__________ (58).Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59) atmospheric pressure. The evaporated (蒸发的), non-saline water is condensed and runs down through a completely filled tube in a controlled manner. The gravity of this water column_______(60)produces the vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower surface again to absorb moisture from the air."The concept is suitable for various water________(62).Single一person units and plantssupplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______(63)system components一air moisture absorption and vacuum evaporation一and the research scientistshave already __________(64)their interplay on a laboratory scale.In a further ________(65)the re- searchers intend to develop a demonstration facility. _________(65)
[多选题]共用题干 Musical Training Can Improve Communication SkillsAmerican scientists say musical training seems to improve communication skills and language retardation (延迟).They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello(大提琴).Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______(64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better. _________65
[多选题]共用题干 第一篇Pool WatchSwimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble.The Royal Society for the Prevention of Accidents says that on average 15 people drown in British pools each year,but many more suffer major injury after getting into difficulties.Now a French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger ofdrowning.When a swimmer sinks towards the bottom of the pool,the new system sends an alarm signal to a pool- side monitoring station and a lifeguard's pager."In trials at a pool in Ancenis,near Nantes,it saved a life within just a few months,"says Alistair McQuade,a spokesman for its maker,Poseidon Technologies.Poseidon keeps watch through a network of underwater and overheard video cameras.Al software analy- ses the images to work out swimmers trajectories(轨道,轨线).To do this reliably,it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool."The under- water environment is a very dynamic one,with many shadows and reflections dancing around."says McQuade.The software does this by"projecting"a shape in its field of view onto an image of the far wall of the pool.It does the same with an image from another camera viewing the shape from a different angle.If the two projections are in the same position,the shape is identified as a shadow and is ignored.But if they are different.the shape is a swimmer and so the system follows its trajectory.To pick out potential drowning victims,anyone in the water who starts to descend slowly is added to the software's "pre-alert"list,says McQuade.Swimmers who then stay immobile on the pool bottom for 5 seconds or more are considered in danger of drowning.Poseidon double-checks that the image really is of a swimmer,not a shadow,by seeing whether it obscures the pool's floor texture when viewed from overhead. If so,it alerts the lifeguard,showing the swimmer's location on a poolside screen.The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe, Buckinghamshire.One man who is impressed with the idea is Travor Baylis,inventor of the clockwork ra- dio.Baylis runs a company that installs swimming pools一and he was once an underwater escapologist(表演 脱身术的人)with a circus. " I say full marks to them if this works and can save lives , " he says. But h"adds that any local authority spending £30,000一plus a on Poseidon system ought to be investing similar amounts in teaching children to swim. Al means the same as_________.
[多选题]共用题干 The iPad1 The iPad is a tablet computer(平板电脑)designed and developed by Apple. It is particularly mar- keted as a platform for audio and visual media such as books,periodicals,movies,music,and games,as well as web content.At about 1.5 pounds(680 grams),its size and weight are between those of most contempora- ry smartphones and laptop computers.Apple released the iPad in April 2010,and sold 3 million of the de- vices in 80 days.2 The iPad runs the same operating system as iPod Touch and iPhone.It can run its own applications as well as ones developed for iPhone.Without modification,it will only run programs approved by Apple and distributed via its online store.3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most pre- vious tablet computers , which uses a pressure-triggered stylus(触控笔).The iPad uses a Wi-Fi data connec- tion to browse(浏览)the Internet, load and stream media ,and install software. Some models also have a 3G wireless data connection which can connect to GSM 3 G data networks.The device is managed and synchro- nized by iTunes on a personal computer via USB cable.4 An iPad has different features and applications one can use to execute different and interesting things.There are lots of iPad applications that the owner can use to enhance the way they communicate.Some of these are how to use social networking sites and other online options.One of the most common uses is for e-mail services.iPad applications like Markdown Mail allow the adoption of specific and particular options. They enable the owner to personalize their email accounts.5 While the iPad is mostly used by consumers it also has been taken up by business users.Some com- panies are adopting iPads in their business offices by distributing or making available iPads to employees.Ex- amples of uses in the workplace include lawyers responding to clients,medical professionals accessing health records during patient exams,and managers approving employee requests.A survey by Frost&Sullivan shows that iPad usage in workplaces is linked to the goals of increased employee productivity,reduced paperwork,and increased revenue. The iPad will only run programs approved by Apple if not_________.
[单选题]The Greatest of Victorian Engineers   In the hundred years up to 1860, the work of a small group of construction engineers carried forward the enormous social and economic change that we associate with the Industrial Revolution in Britain. The most important of these engineers was Isambard Kingdom Brunel, whose work in shipping, bridge-building, and railway construction, to name just three fields, both challenged and motivated his colleagues. He was the driving force behind a number of the hugely ambitious projects, some of which resulted in works which are still in use today.   The son of an engineer, Brunel apprenticed with his father at an early age on the building of the Thames Tunnel. At the age of just twenty, he became engineer in charge of the project. This impressive plan to bore under the Thames twice suffered two major disasters when the river broke through into the tunnel when the second breach(决口)occurred in 1872, Brunel was seriously injured during rescue operation and further work was halted.   While recovering from his injuries, Brunel entered a design competition for a new bridge over the Avon Gorge near Clifton. The original judge of the competition was Thomas Telford, a leading civil engineer of his day, who rejected all entries to the competition in favor of his own design. After considerable scandal, a second contest was held and Brunel's design was accepted. For reasons of funding, however, exacerbated(加剧) by social unrest in Bristol, the project was abandoned in 1843 with only the towers completed. After Brunel’s death, it was decided to begin work on it again, partly so that the bridge could form a fitting memorial to the great engineer. The entire structure was finally completed in 1864. Today, the well-known Clifton Suspension Bridge is a symbol of Bristol, just as the Opera House is of Sydney. Originally intended only for horse-drawn traffic, the bridge now bears over four million motor vehicles a year. 文章(16~22)Brunel was an important airplane engineer in Britain during the Industrial Revolution.
[多选题]共用题干 Wrongly Convicted Man and His Accuser Tell Their StoryNEW YORK,NY,January 5,2010.St.Martin's Press has announced the release of the paperback edition of Picking Cotton,a remarkable true story of what novelist John Grisham calls an"account of violence,rage,redemption(救赎),and,ultimately forgiveness".The story began in 1987,in Burlington,North Carolina,with the rape of a young white college student named Jennifer Thompson.During her ordeal,Thompson swore to herself that she would never forget the face of her rapist,a man who climbed through the window of her apartment and assaulted her brutally.______(46)When the police asked her if she could identify the assailant(袭击者)from a book of mug shots,she picked one that she was sure was correct,and later she identified the same man in a lineup.Based on her convincing eyewitness testimony,a 22-year-old black man named Ronald Cotton was sentenced to prison for two life terms.Cotton's lawyer appealed the decision,and by the time of the appeals hearing, evidence had come to light suggesting that the real rapist might have been a man who looked very like Cotton,an imprisoned criminal named Bobby Poole.______(47)Jennifer Thompson looked at both men face to face,and once again said that Ronald Cotton was the one who raped her.Eleven years later, DNA evidence completely exonerated(证明……清白)Cotton and just as unequivocally(明确地)convicted Poole, who confessed to the crime.______ (48) "The man I was so sure I had never seen in my life was the man who was inches from my throat,who raped me,who hurt me, who took my spirit away,who robbed me of my soul,"she wrote."And the man I had identified so surely on so many occasions was absolutely innocent."______(49)Remarkably both were able to put this tragedy behind them,overcome the racial barrier that divided them,and write a book,which they have subtitled"Our memoir of injustice and redemption".Nevertheless,Thompson says,she still lives"with constant pain that my profound mistake cost him so dearly.______(50)" ______ (48)
[多选题]共用题干 第一篇Pool WatchSwimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble.The Royal Society for the Prevention of Accidents says that on average 15 people drown in British pools each year,but many more suffer major injury after getting into difficulties.Now a French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger ofdrowning.When a swimmer sinks towards the bottom of the pool,the new system sends an alarm signal to a pool- side monitoring station and a lifeguard's pager."In trials at a pool in Ancenis,near Nantes,it saved a life within just a few months,"says Alistair McQuade,a spokesman for its maker,Poseidon Technologies.Poseidon keeps watch through a network of underwater and overheard video cameras.Al software analy- ses the images to work out swimmers trajectories(轨道,轨线).To do this reliably,it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool."The under- water environment is a very dynamic one,with many shadows and reflections dancing around."says McQuade.The software does this by"projecting"a shape in its field of view onto an image of the far wall of the pool.It does the same with an image from another camera viewing the shape from a different angle.If the two projections are in the same position,the shape is identified as a shadow and is ignored.But if they are different.the shape is a swimmer and so the system follows its trajectory.To pick out potential drowning victims,anyone in the water who starts to descend slowly is added to the software's "pre-alert"list,says McQuade.Swimmers who then stay immobile on the pool bottom for 5 seconds or more are considered in danger of drowning.Poseidon double-checks that the image really is of a swimmer,not a shadow,by seeing whether it obscures the pool's floor texture when viewed from overhead. If so,it alerts the lifeguard,showing the swimmer's location on a poolside screen.The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe, Buckinghamshire.One man who is impressed with the idea is Travor Baylis,inventor of the clockwork ra- dio.Baylis runs a company that installs swimming pools一and he was once an underwater escapologist(表演 脱身术的人)with a circus. " I say full marks to them if this works and can save lives , " he says. But h"adds that any local authority spending £30,000一plus a on Poseidon system ought to be investing similar amounts in teaching children to swim. Which of the following statements about Travor Baylis is NOT true?
[多选题]共用题干 Obtaining Drinking Water from Air HumidityNot a plant to be seen,the desert ground is too dry.But the air contains water,and research scientistshave found a. __________(51)of obtaining drinking water from air humidity."The process we have developed is based exclusively on renewable energy sources_________(52)thermal solar collectors andphotovoltaic(光电的)cells , ________( 53 ) makes this method completely energy-autonomous. It will ____________( 54 ) function in regions where there is no electrical infrastructure(基础设施),"says Siegfried Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic(吸湿的) brine(盐水)一saline(含盐的)solution which absorbs moisture一runs down a tower-shaped unit and absorbs water from the air. It is then sucked__________(56)a tank a few meters off the ground in which a vacuum prevails.Energy from solar collectors_________(57)up the brine,which is diluted by the water it has__________ (58).Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59) atmospheric pressure. The evaporated (蒸发的), non-saline water is condensed and runs down through a completely filled tube in a controlled manner. The gravity of this water column_______(60)produces the vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower surface again to absorb moisture from the air."The concept is suitable for various water________(62).Single一person units and plantssupplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______(63)system components一air moisture absorption and vacuum evaporation一and the research scientistshave already __________(64)their interplay on a laboratory scale.In a further ________(65)the re- searchers intend to develop a demonstration facility. _________(64)
[多选题]共用题干 Earth Rocks onMost of the time,the ground feels solid beneath our feet. That{S comforting. But it's also misleading because there's actually a lot going on underground.Masses of land(called plates)slip,slide,and bump against each other,slowly changing the shape of continents and oceans over millions and billions of years.Scientists know that Earth formed about 4.5 billion years ago.They also know that our planet was hot at first. As it cooled , its outermost layer , called the crust(地壳), eventually formed moving plates. Exactly when this shift happened,however,is an open question.Now,an international group of researchers has an answer. They'ye found new evidence suggesting that Earth's crust started shifting at least 3.8 billion years ago.The new estimate is 1.3 billion years earlier than previous ones.Not long before 3. 8 billion years ago,lots of asteroids(小行星)were hitting Earth,keeping its crust in a hot,melted state.After the hard crust formed,much of it sank at various times into the planet's hot in- sides.There,it melted before returning to the surface.In some places,however,the crust never sank.One of the oldest such places is in Greenland,in an area called the Isua supracrustal(上地壳) belt. The rocky crust there is between 3. 7 and 3. 8 billion years old. The belt was once part of the seafloor,but now it is exposed to air.The researchers recently took a close look at the Isua supracrustal belt. They noticed long,parallel cracks in the rock that have been filled in with a type of volcanic rock.To explain this structure,the scientists propose that tension in the crust caused the seafloor to crackopen long ago. Hot , liquid rock , called magma(岩浆),flowed up slowly from deep inside Earth to fill the cracks.Finally,the whole area cooled,forming what we see today.That explanation,plus chemical clues inside the rock,suggests that the Isua supracrustal belt was once part of a plate under the ocean,beginning around 3.8 billion years ago. It took a long time for the melted crust to become hard.
[多选题]共用题干 第三篇The IcemanOn a September day in 1991,two Germans were climbing the mountains between Austria and Italy. High up on a mountain pass,they found the body of a man lying on the ice.At that height(10,499 feet or 3,200 meters),the ice is usually permanent,but 1991 had been an especially warm year. The mountain ice had melted more than usual and so the body had come to the surface.It was lying face downward. The skeleton(骨架)was in perfect condition, except for a wound in the head.There was still skin on the bones and the remains of some clothes.The hands were still holding the wooden handle of an ax and on the feet there were very simple leather and cloth boots.Nearby was a pair of gloves made of tree bark(树皮)and a holder for arrows.Who was this man?How and when had he died?Everybody had a different answer to these questions. Some people thought that it was from this century,perhaps the body of a soldier who died in World War I, since several soldiers had already been found in the area. A Swiss woman believed it might be her father, who had died in those mountains twenty years before and whose body had never been found.The scientists who rushed to look at the body thought it was probably much older,maybe even a thousand years old.With modern dating techniques,the scientists soon learned that the iceman was about 5,300 years old. Born in about 3300 B.C.,he lived during the Bronze Age in Europe.At first scientists thought he was probably a hunter who had died in an accident in the high mountains.More recent evidence,however,tells a different story.A new kind of X-ray shows an arrowhead still stuck in his shoulder. It left only a tiny hole in his skin, but it caused internal damage and bleeding. He almost certainly died from this wound, and not from the wound on the back of his head.This means that he was probably in some kind of a battle.It might have beenpart of a larger war,or he might have beenl fighting bandits.He might even have been a bandit himself.By studying his clothes and tools,scientists have already learned a great deal from the iceman about the times he lived in.we may never know the full story of how he died,but he has given us important clues to the history of those distant times. The body of the iceman was found in the mountains mainly because__________.
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(65)
[多选题]共用题干 Earth Rocks onMost of the time,the ground feels solid beneath our feet. That{S comforting. But it's also misleading because there's actually a lot going on underground.Masses of land(called plates)slip,slide,and bump against each other,slowly changing the shape of continents and oceans over millions and billions of years.Scientists know that Earth formed about 4.5 billion years ago.They also know that our planet was hot at first. As it cooled , its outermost layer , called the crust(地壳), eventually formed moving plates. Exactly when this shift happened,however,is an open question.Now,an international group of researchers has an answer. They'ye found new evidence suggesting that Earth's crust started shifting at least 3.8 billion years ago.The new estimate is 1.3 billion years earlier than previous ones.Not long before 3. 8 billion years ago,lots of asteroids(小行星)were hitting Earth,keeping its crust in a hot,melted state.After the hard crust formed,much of it sank at various times into the planet's hot in- sides.There,it melted before returning to the surface.In some places,however,the crust never sank.One of the oldest such places is in Greenland,in an area called the Isua supracrustal(上地壳) belt. The rocky crust there is between 3. 7 and 3. 8 billion years old. The belt was once part of the seafloor,but now it is exposed to air.The researchers recently took a close look at the Isua supracrustal belt. They noticed long,parallel cracks in the rock that have been filled in with a type of volcanic rock.To explain this structure,the scientists propose that tension in the crust caused the seafloor to crackopen long ago. Hot , liquid rock , called magma(岩浆),flowed up slowly from deep inside Earth to fill the cracks.Finally,the whole area cooled,forming what we see today.That explanation,plus chemical clues inside the rock,suggests that the Isua supracrustal belt was once part of a plate under the ocean,beginning around 3.8 billion years ago. Scientists once estimated that Earth's crust started shifting three billion years ago.
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(52)
[多选题]共用题干 第一篇Pool WatchSwimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble.The Royal Society for the Prevention of Accidents says that on average 15 people drown in British pools each year,but many more suffer major injury after getting into difficulties.Now a French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger ofdrowning.When a swimmer sinks towards the bottom of the pool,the new system sends an alarm signal to a pool- side monitoring station and a lifeguard's pager."In trials at a pool in Ancenis,near Nantes,it saved a life within just a few months,"says Alistair McQuade,a spokesman for its maker,Poseidon Technologies.Poseidon keeps watch through a network of underwater and overheard video cameras.Al software analy- ses the images to work out swimmers trajectories(轨道,轨线).To do this reliably,it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool."The under- water environment is a very dynamic one,with many shadows and reflections dancing around."says McQuade.The software does this by"projecting"a shape in its field of view onto an image of the far wall of the pool.It does the same with an image from another camera viewing the shape from a different angle.If the two projections are in the same position,the shape is identified as a shadow and is ignored.But if they are different.the shape is a swimmer and so the system follows its trajectory.To pick out potential drowning victims,anyone in the water who starts to descend slowly is added to the software's "pre-alert"list,says McQuade.Swimmers who then stay immobile on the pool bottom for 5 seconds or more are considered in danger of drowning.Poseidon double-checks that the image really is of a swimmer,not a shadow,by seeing whether it obscures the pool's floor texture when viewed from overhead. If so,it alerts the lifeguard,showing the swimmer's location on a poolside screen.The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe, Buckinghamshire.One man who is impressed with the idea is Travor Baylis,inventor of the clockwork ra- dio.Baylis runs a company that installs swimming pools一and he was once an underwater escapologist(表演 脱身术的人)with a circus. " I say full marks to them if this works and can save lives , " he says. But h"adds that any local authority spending £30,000一plus a on Poseidon system ought to be investing similar amounts in teaching children to swim. What is required of Al software to save a life?
[单选题]The Sahara Desert is the largest desert in the wld. It stretchesacross Africa from Senegal to Egypt. The Sahara Desert is an unfriendlyenvironment. During the day it's very hot, at night it’s sometimesvery cold. It is also difficult to find water in the Sahara.In 2006, Kevin Lin, Ray Zahab, Charlie Engle decided to dosomething very difficult. They made the decision to run across the SaharaDesert 4,300 miles (6,920km). It seemed impossible to do, but they wanted to try.The three men liked to test themselves, this would be a very big test.On the mning of November 2, Kevin, Ray, Charlie started theirtrip across the Sahara. Every mning they began running at 5:00. At11 a.m.they stopped rested until 5 p.m. Then they ran again until 9:30 in theevening. Each day they ran about 40 miles (64 km). Every day it was the samething. They got up ran. They listened to music on their iPods, they ran ran.Kevin, Ray, Charlie needed to eat a lot of food during theirtrip. Most people need about 2,000 calies of food each day. Kevin, Ray, Charlie needed between 6,000 9,000 calies every day. That's a lot offood! They also needed to drink a lot of water.The three men had some problems on their trip, many times theywanted to quit go home. It was often very hot (140°F/60°C) duringthe day, the heat made them sick. Their legs feet hurt. Sometimes itwas very windy, they couldn't see. One time they got lost. But they didn'tquit. After 111 days, Kevin, Ray; Charlie successfully finished their tripacross the Sahara Desert. They hugged each other put their hs in thewater of the Red Sea. Then they ran to a hotel to take a long shower.  词汇:stretch v. 延伸,伸展calie n. 卡(路里),小卡,大卡quit v. 停止,放  注释:1. ... made the decision to run across ...:......决正跑步横跨......  练习:3. In the dle of the day: the men usually stopped running.
[多选题]共用题干 SemcoAt 21,Ricardo Semler became boss of his father's business in Brazil,Semco,which sold parts for ships. Semler Junior worked like a madman,from 7:30 a. m.until midnight every day.One afternoon,while touring a factory in New York,he collapsed.The doctor who treated him said,"There's nothing wrong with you.But if you continue like this,you'll find a new home in our hospital." Semler got the message.He changed the way he worked.In fact,he changed the way his employees worked too.He let his workers take more responsibility so that they would be the ones worrying when things went wrong. He allowed them to set their own salaries,and he cut all the jobs he thought were unnecessary,like re-- ceptionists and secretaries._______________ (46)"Everyone at Semco,even top managers,meets guests in recep- tion,does the photocopying,sends faxes,types letters and dials the phone."He completely reorganized the office:instead of walls,they have plants at Semco,so bosses can't shut themselves away from everyone else._______________ (47)As for uniforms,some people wear suits and others wear T-shirts.Semler says,"We have a sales manager named Rubin Agater who sits there reading the newspaper hour after hour. He doesn't even pretend to be busy.But when a Semco pump on the other side of the world fails and millions of gallons of oil are about to spill into the sea,Rubin springs into action.______________(48) That's when he earns his salary. No one cares if he doesn't look busy the rest of the time."Semco has flexible working hours;the employees decide when they need to arrive at work.The employees also evaluate their bosses twice a year.______________ (49)It sounds perfect,but does it work?The answer is in the numbers:in the last six years,Semco's revenues have gone from$35 million to $212 million.The company has grown from eight hundred employees to 3,000.Why?Semler says it's because of"peer pressure".Peer pressure makes employees work hard for everyone else._______________ (50)In other words,Ricardo Semler treats his workers like adults and expects them to act like adults.And they do. __________(48)
[多选题]共用题干 Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel(矿物燃 料),meaning that it is derived from orgaiiic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane(甲烷).2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity.In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of new electricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits(发出)less pollution than other fossil fuel sources. When natural gas is burned , it produces mostly carbon dioxide(二氧化碳)and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)一making natural gas the clea-nest burning fossil fuel of all.4 The United States consumes about one一third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts that natural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG(液化天然气)has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import- ers of LNG are Japan,Korea,France and Spain. Natural gas is stored deep_______.
[多选题]共用题干 第一篇How the First Stars in the Universe Came into ExistenceResearchers believe that our universe began with the Big Bang(宇宙大爆炸)about 13 billion years ago,and that soon after that event,matter began to form as small dust grains and gases.How the first stars formed from this dust and gas has been a burning question for years,but a state-of-the-art computer simula- tion now offers the most detailed picture yet of how these first stars in the universe came into existence.The composition of the early universe was quite different from that of today,and the physics that governed the early universe were also somewhat simpler. Dr. Naoki Yoshida and colleagues in Japan and the U.S.incorporated these conditions of the early universe,sometimes referred to as the"cosmic dark ages",to simulate the formation of an astronomical object that would eventually shine its light into this darkness.The result is a detailed description of the formation of a protostar(原恒星)一the early stage of a mas- sive primordial(原始的)star of our universe , and the researchers ' computer simulation , which has been called a"cosmic Rosetta Stone"sets the bar for further investigation into the star formation process.The ques- tion of how the first stars evolved is so important because their formations and eventual explosions providedthe seeds for subsequent stars to come into being.According to their simulation,gravity acted on minute density variations in matter,gases,and the myste- riou;"dark matter"of the universe after the Big Bang in order to form this early stage of a star一a protostarwith a mass of just one percent of our sun. The simulation reveals how pre-stellar(前恒星的)gases would have actually evolved under the simpler physics of the early universe to form this protostar.Dr. Yoshida's simulation also shows that the protostar would likely evolve into a massive star capable ofsynthesizing(合成)heavy elements,not just in later generations of stars,but soon after the Big Bang."This general picture of star formation,and the ability to compare how stellar objects form in different time periods and regions of the universe,will eventually allow investigation into the origins of life and planets,"said Lars Herriquist,a professor of Astronomy at Harvard University and a co-author of this latest report."The abundance of elements in the universe has increased as stars have accumulated,"he says,"and the formation and destruction of stars continues to spread these elements further across the universe.So all ofthe elements in our bOdies originally formed from nuclear reactions in the centers of stars,long ago."Their simulation of the birth of a protostar in the early universe signifies a key step toward the ambitiousgoal of piecing together the formation of an entire primordial star and of predicting the mass and properties of these first stars of the universe.More powerful computers,more physical data,and an even larger range will be needed for further calculations and simulations,but these researchers hope to eventually extend this simu- lation to the point of nuclear reaction initiation一when a stellar object becomes a true star."Dr. Yoshida has taken the study of primordial star formation to a new level with this simulation,but it still gets us only to the halfway point towards our final goal.It is like laying the foundation of a skyscraper," said Volker Bromm,assistant professor of Astronomy at the University of Texas, Austin and the author of a companion article."We must continue our studies in this area to understand how the initially tiny protostar grows,layer by layer,to eventually form a massive star. But here,the physics become much more complicated and even more computational resources are needed." According to Paragraph 4,which of the following is NOT true about a protostar?
[多选题]共用题干 Musical Training Can Improve Communication SkillsAmerican scientists say musical training seems to improve communication skills and language retardation (延迟).They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello(大提琴).Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______(64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better. _________56
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(57)
[多选题]共用题干 Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel(矿物燃 料),meaning that it is derived from orgaiiic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane(甲烷).2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity.In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of new electricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits(发出)less pollution than other fossil fuel sources. When natural gas is burned , it produces mostly carbon dioxide(二氧化碳)and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)一making natural gas the clea-nest burning fossil fuel of all.4 The United States consumes about one一third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts that natural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG(液化天然气)has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import- ers of LNG are Japan,Korea,France and Spain. Paragraph 5___________
[多选题]共用题干 第三篇A New Strategy to Overcome Breast CancerPost-menopausal(绝经后的)women who walk for an hour a day can cut their chance of breast cancersignificantly,a study has suggested.The report,which followed 73,000 women for 17 years,found walking for at least seven hours a week lowered the risk of the disease.The American Cancer Society team said this was the first time reduced risk was specifically linked to walking.UK experts said there was more evidence that lifestyle influenced cancer risk.A recent poll for the charity Ramblers found a quarter of adults walk for no more than an hour a week, but being active is known to reduce the risk of a number of cancers.This study,published in CancerEpidemiology,Biomarkers&Prevention,followed 73,615 women out of 97,785 aged 50-74 who had been recruited by the American Cancer Society between 1992 and 1993,so it could monitor the incidence of cancer in the group.They were asked to complete questionnaires on their health and on how much time they were active and participating in activities such as walking, swimming and aerobics(有氧运动)and how much time they spentsitting watching television or reading.They completed the same questionnaires at two-year intervals between 1997 and 2009.Of the women,47%said walking was their only recreational activity.Those who walked for at least seven hours per week had a 14%lower risk of breast cancer compared to those who walked three or fewer hours per week.Dr.Alpa Patel,a senior epidemiologist at the American Cancer Society in Atlanta,Georgia,who led the study,said:"Given that more than 60%of women report some daily walking,promoting walking as ahealthy leisure-time activity could be an effective strategy for increasing physical activity amongst post-menopausal women.We were pleased to find that without any other recreational activity,just walking one hour a day was associated with a lower risk of breast cancer in these women."" More strenuous(紧张的)and longer activities lowered the risk even more."Baroness Delyth Morgan,chief executive of Breast Cancer Campaign,said:"This study adds further evidence that our lifestyle choices can play a part in influencing the risk of breast cancer and even small changes incorporated into our normal day-to-day activity can make a difference."She added:"We know that the best weapon to overcoming breast cancer is the ability to stop it occurring in the first place.The challenge now is how we turn these findings into action and identify other sustainable lifestyle changes that will help us prevent breast cancer." Dr.Alpa Patel was______.
[单选题]Inquest told of hospital errA HOSPITAL err left a dying man on the wrong ward f two days asdeep vein thrombosis (DVT) ravaged his body, an inquest heard. Stephen MelvinNewbold suffered massive brain damage when a blood clot fmed in his veins.Now his families are considering legal action against Yk Hospital, sayingthat his death was “untimely unnecessary”.Mr Newbold, a 52-year-old maintenance wker, went to Yk Hospitalon November 3 complaining of a swollen right foot. He should have been sent toa surgical ward he would have been treated with1 Fragmin, a drug whichcounters the effects of DVT. However, hospital staff wrongly admitted him to2an thopedic ward, he stayed f two days, befe finally beingtransferred to the care of a consultant vascular surgeon. Twenty-four hourslater, on November 6, docts decided they would have to operate to remove hisleg below the knee.The operation went ahead on November 10, but two days later MrNewbold suffered a cardiac arrest. A scan revealed he had had a pulmonaryembolism, a condition related to DVT. Mr Newbold suffered brain damage diedin the hospital on November 16.Giving evidence, the surgeon said he could not explain why MrNewbold had been admitted to an thopedic ward it was not policy toadminister Fragmin. He did not know why his medical team had not given MrNewbold the drug later.Yk coner Donald Coverdale said, “From November 3until the day of the operation, no Fragmin was given to Mr Newbold. If he hadbeen admitted to a consultant vascular surgeon’s care from day one,it is clear that Fragmin would have been prescribed. Fragmin reduces the riskof DVT, but does not eliminate it. It is impossible to say whether Mr Newboldwould have suffered this DVT if he had received the Fragmin.” He recded averdict of death by misadventure.Kim Daniells, Mr Newbold’s family’s lawyer,said, “The family hope that the hospital will learn from the errs, that no other families will have to suffer in the future.”A spokeswoman f Yk Hospital’s NHS Trust said, “We wouldlike to extend our sincere sympathies to the family of Stephen Newbold duringthis difficult time.”  词汇:ward n.病房vein n.血管thrombosis n.血栓clot n.凝块maintenance n.维修,维护Fragmin n.法安明(又名片段化蛋白)staff n.员工;职工consultant n.顾问,咨询,会诊医师surgeon n.心血管外科顾问knee n.膝盖embolism n.栓塞;栓塞形成verdict n.裁决misadventure n.灾难,不幸遭遇,意外事故sympathy n.同情  注释:1.be treated with...被用......药物进行治疗2.be admitted to...被收容至,被移送至(本文中是“被送至病房”)  练习: 1.The patient was admitted with an injured foot.
[多选题]共用题干 SemcoAt 21,Ricardo Semler became boss of his father's business in Brazil,Semco,which sold parts for ships. Semler Junior worked like a madman,from 7:30 a. m.until midnight every day.One afternoon,while touring a factory in New York,he collapsed.The doctor who treated him said,"There's nothing wrong with you.But if you continue like this,you'll find a new home in our hospital." Semler got the message.He changed the way he worked.In fact,he changed the way his employees worked too.He let his workers take more responsibility so that they would be the ones worrying when things went wrong. He allowed them to set their own salaries,and he cut all the jobs he thought were unnecessary,like re-- ceptionists and secretaries._______________ (46)"Everyone at Semco,even top managers,meets guests in recep- tion,does the photocopying,sends faxes,types letters and dials the phone."He completely reorganized the office:instead of walls,they have plants at Semco,so bosses can't shut themselves away from everyone else._______________ (47)As for uniforms,some people wear suits and others wear T-shirts.Semler says,"We have a sales manager named Rubin Agater who sits there reading the newspaper hour after hour. He doesn't even pretend to be busy.But when a Semco pump on the other side of the world fails and millions of gallons of oil are about to spill into the sea,Rubin springs into action.______________(48) That's when he earns his salary. No one cares if he doesn't look busy the rest of the time."Semco has flexible working hours;the employees decide when they need to arrive at work.The employees also evaluate their bosses twice a year.______________ (49)It sounds perfect,but does it work?The answer is in the numbers:in the last six years,Semco's revenues have gone from$35 million to $212 million.The company has grown from eight hundred employees to 3,000.Why?Semler says it's because of"peer pressure".Peer pressure makes employees work hard for everyone else._______________ (50)In other words,Ricardo Semler treats his workers like adults and expects them to act like adults.And they do. __________(49)
[多选题]共用题干 The Case of the Disappearing FingerprintsOne useful anti-cancer drug can effectively erase the whorls(箩状指纹)and other characteristic marks that give people their distinctive fingerprints(指纹).Losing them could become troublesome. A case______________ (51) online in a letter by Annals of Oncology(肿瘤学)indicates how big a ______________ (52) losing fingerprints is.Eng-Huat Tan,a Singapore-based medical doctor describes a 62-year-old man who has usedcapecitabine(卡培他滨)to______________ ( 53 ) his nasopharyngeal cancer(鼻咽癌).After three years on the_______________ (54),the patient decided to visit his U.S.relatives last December. But he was stopped by U. S. customs officials_______________(55)4 hours after entering the country when those officials couldn't get finger- prints from the man. There were no ___________( 56 ) swirly(旋涡状的)marks appearing from his index finger."U.S.customs has been fingerprinting incoming foreign visitors for years,"Tan says."Unfortunately,forthe Singaporean traveler,one potential ______________ (57)effect of his drug treatment is a smoothing of the tis-sue on the finger pads. ______________ (58)no fingerprints.""It is uncertain when fingerprint ______________ (59)will begin to take place in patients who are takingcapecitabine,"Tan points out.So he______________ (60)any physicians who prescribe the drug to provide theirpatients with a doctor's______________ (61)pointing out that their medicine may cause fingerprints to disap-pear.Eventually,the Singapore traveler made it into the United States.But he's also now got the doctor's ex-planatory note一and won't leave home______________ (62)it.By the way, maybe the Food and Drug Administration(美国食品药物管理局),________ (63) approved use of the drug 11 years ago,should consider updating its list of side effects_______________ (64)with this medicine. The current list does note that patients may experience vomiting(呕吐),stomach pain and some other side effects.But no where_______________ (65)it mention the potential for loss of fingerprints. _________(54)
[多选题]共用题干 California Gives Green Light to Space Solar PowerEnergy beamed down from space is one step closer to reality,now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts(兆瓦)of power beamed down from solar-power satellites beginning in 2016.But some major challenges will have to beovercome if the technology is to be used widely.A start-up company called Solaren is designing the satellites,which it says will use radio waves to beamenergy down to a receiving station on Earth.The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geo- synchronous(与地球同步的)orbit. Earth-based solar cells , by contrast , can only collect sun light during day-time and when skies are clear.But space-based solar power must grapple(努力克服)with the high cost per kilogram of launching things in- to space,says Richard Schwartz of Purdue University in West Lafayette,Indiana."if you're talking about it being economically viable for power of the Earth,it's a tough go,"he says.Cal Boerman,Solaren's director of energy services,says the company designed its satellites with a view to keeping launch costs down."We knew we had to come up with a different,revolutionary design,"he says. A patent the company has won describes ways to reduce the system's weight,including using inflatable mir- rors to focus sunlight on solar cells,so a smaller number can collect the same amount of energy.But using mirrors introduces other challenges,including keeping the solar cells from overheating,says Schwartz."You have to take care of heat dissipation(散发)because you're now concentrating a lot of energy in one place,"he says.According to the company's patent,Solaren's solar cells will be connected to radia-tors to help keep them cool.Though Boerman says the company believes it can make space-based solar power work,it is not expec-ting to crowd out other forms of renewable energy.Laws in California and other states require increasing use of renewable energy in coming years,he points out."To meet those needs,we're going to need all types of renewable energy sources,"he says. Solaren is going to design 200 solar-power satellites.
[多选题]共用题干 Obtaining Drinking Water from Air HumidityNot a plant to be seen,the desert ground is too dry.But the air contains water,and research scientistshave found a. __________(51)of obtaining drinking water from air humidity."The process we have developed is based exclusively on renewable energy sources_________(52)thermal solar collectors andphotovoltaic(光电的)cells , ________( 53 ) makes this method completely energy-autonomous. It will ____________( 54 ) function in regions where there is no electrical infrastructure(基础设施),"says Siegfried Egner,head of the research team. The principle of the_________(55)is as follows:hygroscopic(吸湿的) brine(盐水)一saline(含盐的)solution which absorbs moisture一runs down a tower-shaped unit and absorbs water from the air. It is then sucked__________(56)a tank a few meters off the ground in which a vacuum prevails.Energy from solar collectors_________(57)up the brine,which is diluted by the water it has__________ (58).Because of the vacuum,the boiling point of the liquid is lower than it would be under__________(59) atmospheric pressure. The evaporated (蒸发的), non-saline water is condensed and runs down through a completely filled tube in a controlled manner. The gravity of this water column_______(60)produces the vacuum and so a vacuum pump is not needed.The reconcentrated brine________(61)down the tower surface again to absorb moisture from the air."The concept is suitable for various water________(62).Single一person units and plantssupplying water to entire hotels are conceivable,"says Egner. Prototypes have been built for_______(63)system components一air moisture absorption and vacuum evaporation一and the research scientistshave already __________(64)their interplay on a laboratory scale.In a further ________(65)the re- searchers intend to develop a demonstration facility. _________(61)
[多选题]共用题干 第三篇A New Strategy to Overcome Breast CancerPost-menopausal(绝经后的)women who walk for an hour a day can cut their chance of breast cancersignificantly,a study has suggested.The report,which followed 73,000 women for 17 years,found walking for at least seven hours a week lowered the risk of the disease.The American Cancer Society team said this was the first time reduced risk was specifically linked to walking.UK experts said there was more evidence that lifestyle influenced cancer risk.A recent poll for the charity Ramblers found a quarter of adults walk for no more than an hour a week, but being active is known to reduce the risk of a number of cancers.This study,published in CancerEpidemiology,Biomarkers&Prevention,followed 73,615 women out of 97,785 aged 50-74 who had been recruited by the American Cancer Society between 1992 and 1993,so it could monitor the incidence of cancer in the group.They were asked to complete questionnaires on their health and on how much time they were active and participating in activities such as walking, swimming and aerobics(有氧运动)and how much time they spentsitting watching television or reading.They completed the same questionnaires at two-year intervals between 1997 and 2009.Of the women,47%said walking was their only recreational activity.Those who walked for at least seven hours per week had a 14%lower risk of breast cancer compared to those who walked three or fewer hours per week.Dr.Alpa Patel,a senior epidemiologist at the American Cancer Society in Atlanta,Georgia,who led the study,said:"Given that more than 60%of women report some daily walking,promoting walking as ahealthy leisure-time activity could be an effective strategy for increasing physical activity amongst post-menopausal women.We were pleased to find that without any other recreational activity,just walking one hour a day was associated with a lower risk of breast cancer in these women."" More strenuous(紧张的)and longer activities lowered the risk even more."Baroness Delyth Morgan,chief executive of Breast Cancer Campaign,said:"This study adds further evidence that our lifestyle choices can play a part in influencing the risk of breast cancer and even small changes incorporated into our normal day-to-day activity can make a difference."She added:"We know that the best weapon to overcoming breast cancer is the ability to stop it occurring in the first place.The challenge now is how we turn these findings into action and identify other sustainable lifestyle changes that will help us prevent breast cancer." Which of the following statements is true according to the passage?
[多选题]共用题干 第三篇Scientists Make Sweet DiscoveryGood news for chocoholics:the treat preferred by millions all over the world is good for you,according to American researchers at the University of California. Chocolate contains substances called flavonoids(类黄 酮)that can help maintain a healthy heart and good circulation.The researchers have discovered that cocoa acts like aspirin and that eating a bar of chocolate once in a while may contribute to a healthy diet. Chocolate has also been shown to release endorphins(内啡肽) in the body: these chemicals help to reduce pain andstress and make you feel happy.But who first discovered this wonderful way of keeping healthy?The Olmec Indians of Mexico and CentralAmerica were the first to grow cocoa beans,in about 1500 BC,and the Mayas were drinking unsweetened cocoa hundreds of years before it became fashionable in Europe.The word chocolate comes from the Nahuatl word xocolati,which means"bitter water".In 1544,a delegation of Mayan nobles visited Philip of Spain and gave him jars of cocoa as a gift. Cocoa soon became fashionable in Spain and Portugal.The Spanish were the first to add sugar to their cocoa drink. In the 17th century,chocolate was becoming fashionable with the middle-classes,not only as a drink but also as a medicine.By the middle of the century,solid chocolate was becoming familiar. In 1753,a Swedish scientist re- named cocoa theobroma or" food for the gods".In 1765,James Baker and John Hanan opened the first choco- late mill in the United States,introducing chocolate to the average citizen.In 1876,in Switzerland,Daniel Peter had the idea of adding milk in the chocolate,making process and produced the first milk chocolate.Since then,chocolate has grown enormously in popularity. One of the biggest chocolate-eating nations isBritain where the average man,woman,and child eats nine kilos of chocolate a year!In fact,chocolate is the number one comfort food and there are more"chocoholics"in Britain than anywhere else in the world.Re- searchers warn that although chocolate is good for you,it should be eaten in small quantities and with noadded milk. What is the author's tone about eating chocolate?
[多选题]共用题干 第一篇How the First Stars in the Universe Came into ExistenceResearchers believe that our universe began with the Big Bang(宇宙大爆炸)about 13 billion years ago,and that soon after that event,matter began to form as small dust grains and gases.How the first stars formed from this dust and gas has been a burning question for years,but a state-of-the-art computer simula- tion now offers the most detailed picture yet of how these first stars in the universe came into existence.The composition of the early universe was quite different from that of today,and the physics that governed the early universe were also somewhat simpler. Dr. Naoki Yoshida and colleagues in Japan and the U.S.incorporated these conditions of the early universe,sometimes referred to as the"cosmic dark ages",to simulate the formation of an astronomical object that would eventually shine its light into this darkness.The result is a detailed description of the formation of a protostar(原恒星)一the early stage of a mas- sive primordial(原始的)star of our universe , and the researchers ' computer simulation , which has been called a"cosmic Rosetta Stone"sets the bar for further investigation into the star formation process.The ques- tion of how the first stars evolved is so important because their formations and eventual explosions providedthe seeds for subsequent stars to come into being.According to their simulation,gravity acted on minute density variations in matter,gases,and the myste- riou;"dark matter"of the universe after the Big Bang in order to form this early stage of a star一a protostarwith a mass of just one percent of our sun. The simulation reveals how pre-stellar(前恒星的)gases would have actually evolved under the simpler physics of the early universe to form this protostar.Dr. Yoshida's simulation also shows that the protostar would likely evolve into a massive star capable ofsynthesizing(合成)heavy elements,not just in later generations of stars,but soon after the Big Bang."This general picture of star formation,and the ability to compare how stellar objects form in different time periods and regions of the universe,will eventually allow investigation into the origins of life and planets,"said Lars Herriquist,a professor of Astronomy at Harvard University and a co-author of this latest report."The abundance of elements in the universe has increased as stars have accumulated,"he says,"and the formation and destruction of stars continues to spread these elements further across the universe.So all ofthe elements in our bOdies originally formed from nuclear reactions in the centers of stars,long ago."Their simulation of the birth of a protostar in the early universe signifies a key step toward the ambitiousgoal of piecing together the formation of an entire primordial star and of predicting the mass and properties of these first stars of the universe.More powerful computers,more physical data,and an even larger range will be needed for further calculations and simulations,but these researchers hope to eventually extend this simu- lation to the point of nuclear reaction initiation一when a stellar object becomes a true star."Dr. Yoshida has taken the study of primordial star formation to a new level with this simulation,but it still gets us only to the halfway point towards our final goal.It is like laying the foundation of a skyscraper," said Volker Bromm,assistant professor of Astronomy at the University of Texas, Austin and the author of a companion article."We must continue our studies in this area to understand how the initially tiny protostar grows,layer by layer,to eventually form a massive star. But here,the physics become much more complicated and even more computational resources are needed." According to the first two paragraphs,the early universe_______.
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(62)
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(60)
[多选题]共用题干 I Know Just How You FeelDo you feel sad?Happy?Frustrated?Insouciant?Exonerated?Infuriated?Do you think that the way you display these emotions is unique?Well,think again.Even the expression of the most personal feelings can be divided into groups,classified,and perhaps,taught. This week sees the publication of Mind Reading, an interactive DVD displaying every possible human emotion.It demonstrates 412 distinct ways in which we feel:the first visual dictionary of the human heart.The attempt to classify expressions began with Darwin.His The Expression of the Emotions in Man and Animals,published in 1872,divided the emotions into six types一anger,fear,sadness,disgust,surprise and enjoyment.__________(46)Every other feeling,of which there may be thousands,was thought to derive from Darwin's small group.More complex expressions of emotion were likely to be learned and therefore more specific to each culture.But now it is believed that,whereas gestures do not cross cultural boundaries well,many more facial ex-pressions than Darwin's half-dozen are shared worldwide.________(47)The Mind Reading DVD is a systematic visual record of each of these expressions being acted out.The project was conceived by Professor Simon Baron-Cohen of the autism(孤独症)research centre in Cambridge as an aid for people with autism,who has difficulty both reading and expressing emotions.But it quickly became apparent that it had broader uses.Novelists,actors and portrait painters,for example,all need to understand a wide range of emotional expression,and teachers could use it for classes in personal and so- cial development. Baron-Cohen's team first had to decide what counted as an emotion._________( 48) Using this definition,1,5 12 emotion terms were identified and put to a panel who had to decide if each repre- sented a separate emotion,or if they were synonyms.This list was whittled down to 412,arranged in 24 groups from"afraid"to"wanting".Once the emotions were defined and classified,a DVD seemed the clearest and most efficient way to dis- play them.In Mind Reading,each expression is acted out一six times,by six different actors一in three seconds. _________(49)The explanation for this is simple:we may find it difficult to describe emotions usingwords,but we instantly recognize one when we see it on someone's face."It was really clear when the actors had got it right,"says Cathy Collis,who directed the DVD."Although the actors were given some direction," says Ms Collis,"they were not told which facial muscles they should move."__________(50)For example, when someone feels contempt,you can't say for certain that their eyebrows always go down.Someone who has tried to establish such rules is the American,Professor Paul Ekman,who has built a database of how the face moves for every emotion.The face can make 43 distinct muscle movements called "action units".These can be combined into more than 10,000 visible facial shapes.Ekman has written out a pattern of facial muscular movements to represent each emotion. __________(46)
[多选题]共用题干 The iPad1 The iPad is a tablet computer(平板电脑)designed and developed by Apple. It is particularly mar- keted as a platform for audio and visual media such as books,periodicals,movies,music,and games,as well as web content.At about 1.5 pounds(680 grams),its size and weight are between those of most contempora- ry smartphones and laptop computers.Apple released the iPad in April 2010,and sold 3 million of the de- vices in 80 days.2 The iPad runs the same operating system as iPod Touch and iPhone.It can run its own applications as well as ones developed for iPhone.Without modification,it will only run programs approved by Apple and distributed via its online store.3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most pre- vious tablet computers , which uses a pressure-triggered stylus(触控笔).The iPad uses a Wi-Fi data connec- tion to browse(浏览)the Internet, load and stream media ,and install software. Some models also have a 3G wireless data connection which can connect to GSM 3 G data networks.The device is managed and synchro- nized by iTunes on a personal computer via USB cable.4 An iPad has different features and applications one can use to execute different and interesting things.There are lots of iPad applications that the owner can use to enhance the way they communicate.Some of these are how to use social networking sites and other online options.One of the most common uses is for e-mail services.iPad applications like Markdown Mail allow the adoption of specific and particular options. They enable the owner to personalize their email accounts.5 While the iPad is mostly used by consumers it also has been taken up by business users.Some com- panies are adopting iPads in their business offices by distributing or making available iPads to employees.Ex- amples of uses in the workplace include lawyers responding to clients,medical professionals accessing health records during patient exams,and managers approving employee requests.A survey by Frost&Sullivan shows that iPad usage in workplaces is linked to the goals of increased employee productivity,reduced paperwork,and increased revenue. Paragraph 5_________
[多选题]共用题干 第二篇Some People do Not Taste Salt Like OthersLow-salt foods may be harder for some people to like than others,according to a study by a Penn State College of Agricultural Sciences food scientist.The research indicates that genetic factors influence some of the difference in the levels of salt we like to eat.Those conclusions are important because recent,well-publicized efforts to reduce the salt content in food have left many people struggling to accept fare that simply does not taste as good to them as it does to others, pointed out John Hayes,assistant professor of food science who was lead investigator on the study.Diets high in salt can increase the risk of high blood pressure and stroke.That is why public health ex- perts and food companies are working together on ways to help consumers lower salt intake through foods that are enjoyable to eat.This study increases undersfanding of salt preference and consumption.The research involved 87 carefully screened participants who sampled salty foods such as soup andchips,on multiple occasions,spread out over weeks.Test subjects were 45 men and 42 women,reportedly healthy,ranging in age from 20 to 40 years.The sample was composed of individuals who were not actively modifying their dietary intake and did not smoke cigarettes.They rated the intensity of taste on a commonly used scientific scale,ranging from barely detectable to strongest sensation of any kind."Most of us like the taste of salt.However,some individuals eat more salt,both because they like the taste of saltiness more,and also because it is needed to block other unpleasant tastes in food,"said Hayes. "Supertasters,people who experience tastes more intensely,consume more salt than nontasters do.Snack foods have saltiness as their primary flavor,and at least for these foods,more is better,so the supertasters seem to like them more."However,supertasters also need higher levels of salt to block unpleasant bitter tastes in food such as cheese,Hayes noted."For example,cheese is a wonderful blend of dairy flavors from fermented milk,but al- so bitter tastes from ripening that are blocked by salt,"he said."A supertaster finds low-salt cheese unpleasant because the bitterness is too pronounced."Hayes cited research done more than 75 years ago by a chemist named Fox and a geneticist named Blakeslee,showing that individuals differ in their ability to taste certain chemicals.As a result,Hayes ex- plained,we know that a wide range in taste acuity exists,and this variation is as normal as variations in eye and hair color."Some people,called supertasters,'describe bitter compounds as being extremely bitter,while others, called nontasters,find these same bitter compounds to be tasteless or only weakly bitter,"he said."Response to bitter compounds is one of many ways to identify biological differences in food preference because super- tasting is not limited to bitterness." John Hayes points out that_________.
[多选题]共用题干 第三篇Cell Phones : Hang Up or Keep Talking?Millions of people are using cell phones today.In many places it is actually considered unusual not to use one.In many countries,cell phones are very popular with young people.They find that the phones are more than a means of communication一having a mobile phone shows that they are cool and connected.The explosions around the world in mobile phone use make some health professionals worried.Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.On the other hand,why do some medical studies show changes in the brain cells of some people who use mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning (扫描)equipment. In one case , a traveling salesman had to retire at a young age because of serious memory Loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man usedto talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is some radiation,but they say the amount is too small to worry about.As the discussion about their safety continues,it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile phone too often. The word"detected"in Paragraph 3 could be best replaced by__________.
[多选题]共用题干 Earth Rocks onMost of the time,the ground feels solid beneath our feet. That{S comforting. But it's also misleading because there's actually a lot going on underground.Masses of land(called plates)slip,slide,and bump against each other,slowly changing the shape of continents and oceans over millions and billions of years.Scientists know that Earth formed about 4.5 billion years ago.They also know that our planet was hot at first. As it cooled , its outermost layer , called the crust(地壳), eventually formed moving plates. Exactly when this shift happened,however,is an open question.Now,an international group of researchers has an answer. They'ye found new evidence suggesting that Earth's crust started shifting at least 3.8 billion years ago.The new estimate is 1.3 billion years earlier than previous ones.Not long before 3. 8 billion years ago,lots of asteroids(小行星)were hitting Earth,keeping its crust in a hot,melted state.After the hard crust formed,much of it sank at various times into the planet's hot in- sides.There,it melted before returning to the surface.In some places,however,the crust never sank.One of the oldest such places is in Greenland,in an area called the Isua supracrustal(上地壳) belt. The rocky crust there is between 3. 7 and 3. 8 billion years old. The belt was once part of the seafloor,but now it is exposed to air.The researchers recently took a close look at the Isua supracrustal belt. They noticed long,parallel cracks in the rock that have been filled in with a type of volcanic rock.To explain this structure,the scientists propose that tension in the crust caused the seafloor to crackopen long ago. Hot , liquid rock , called magma(岩浆),flowed up slowly from deep inside Earth to fill the cracks.Finally,the whole area cooled,forming what we see today.That explanation,plus chemical clues inside the rock,suggests that the Isua supracrustal belt was once part of a plate under the ocean,beginning around 3.8 billion years ago. The formation of the Isua supracrustal belt is thought to have started about 3.8 billion years ago.
[多选题]共用题干 Young Adults Who Exercise Get Higher IQ ScoresYoung adults who are fit have a higher IQ and are more likely to go on to university,reveals a major new study_________(51)out at the Sahlgrenska Academy and Sahlgrenska University Hospital.The results were recently published in the Proceedings of the National Academy of Sciences(PNAS).The study__________(52)1._________(1.)2 million Swedish men doing military service who were born between 1950 and1976._________(1976.)The research group analyzed the ________(53)of both physical and IQ tests the youngsters took right after they started serving the army.The study shows a clear link _________(54)good physical fitness and better results for the IQ test.The strongest links are for ________(55)thinking and verbal comprehension.But it is only fitness thatplays a _________ (56)in the results for the IQ test,and not strength."Being fit means that you also havegood heart and lung __________(57)and that your brain gets plenty of oxygen."says Michael Nilsson,pro-fessor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital."This may be one of the reasons why we can see a clear link with fitness,but not with muscular_________(58).We are also seeing that there are growth factors that are important."By analyzing data for twins,the researchers have been________(59)to determine that it is primarily environmental factors and not genes that___________(60)the link between fitness and a higher IQ."We have also shown that those youngsters who _______(61)their physical fitness between the ages of 1 5 and 1 8 increase their performance."says Maria Aberg,researcher at the Sahlgrenska Academy andphysician at Aby health centre."This being the case,physical education is a_______(62)that has an important place in schools,and is an absolute must________(63)we want to do well in math and other theoretical subjects."The researchers have also compared the results from fitness tests during national service_______(64) the socioeconomic status of the men later in life.Those who were fit at I 8 were more__________(65)to go into higher education,and many secured more qualified jobs. _________(51)
[多选题]共用题干 第二篇Eye-tracker Lets You Drag and Drop Files With a GlanceBored of using a mouse?Soon you'11 be able to change stuff on your computer screen-and then move it directly onto your smartphone or tablet(平板电脑)-with nothing more than a glance.A system called EyeDrop uses a head-mounted eye tracker that simultaneously records your field of view, so it knows where you are looking on the screen.Gazing at an object-a photo,say-and then pressing a key, selects that object.It can then be moved from the screen to a tablet or smartphone just by glancing at the second device,as long as the two are connected wirelessly."The beauty of using gaze to support this is that our eyes naturally focus on content that we want to acquire,"says Jayson Turner,who developed the system with colleagues at Lancaster University,UK.Turner believes EyeDrop would be useful to transfer an interactive map or contact information from a public display to your smartphone or tablet for sharing photos.A button needs to be used to select the object you are looking at otherwise you end up with the"Midas touch"(点石成金)effect , whereby everything you look at gets selected by your gaze , says Turner."Imagine if your mouse clicked on everything it pointed at,"he says.Christian Holz,a researcher in human-computer interaction at Yahoo Labs in Sunnyvale,California, says the system is a nice take on getting round this fundamental problem of using gaze-tracking to interact." EyeDrop solves this in a slick(灵巧的)way by combining it with input on the touch devices we carry with us most of the time anyway and using touch input as a clutching mechanism,"he says."This now allows users to seamlessly(无缝地)interact across devices far and close in a very natural manner."While current eye-trackers are rather bulky,mainstream consumer devices are not too far away.Swedish firm Tobii is developing gaze-tracking technology that can be installed in laptops and tablets and is expected to be available to buy next year.And the Google Glass headset is expected to include eye-tracking in the future.Turner says he has also looked at how content can be cut and pasted or drag-and-dropped using a mix of gaze and taps on a touchscreen.The system was presented at the Conference on Mobile and Ubiquitous Multimedia in Sweden,last week. Which of the following statements is true of eye-trackers for consumer use?
[多选题]共用题干 第二篇Eye-tracker Lets You Drag and Drop Files With a GlanceBored of using a mouse?Soon you'11 be able to change stuff on your computer screen-and then move it directly onto your smartphone or tablet(平板电脑)-with nothing more than a glance.A system called EyeDrop uses a head-mounted eye tracker that simultaneously records your field of view, so it knows where you are looking on the screen.Gazing at an object-a photo,say-and then pressing a key, selects that object.It can then be moved from the screen to a tablet or smartphone just by glancing at the second device,as long as the two are connected wirelessly."The beauty of using gaze to support this is that our eyes naturally focus on content that we want to acquire,"says Jayson Turner,who developed the system with colleagues at Lancaster University,UK.Turner believes EyeDrop would be useful to transfer an interactive map or contact information from a public display to your smartphone or tablet for sharing photos.A button needs to be used to select the object you are looking at otherwise you end up with the"Midas touch"(点石成金)effect , whereby everything you look at gets selected by your gaze , says Turner."Imagine if your mouse clicked on everything it pointed at,"he says.Christian Holz,a researcher in human-computer interaction at Yahoo Labs in Sunnyvale,California, says the system is a nice take on getting round this fundamental problem of using gaze-tracking to interact." EyeDrop solves this in a slick(灵巧的)way by combining it with input on the touch devices we carry with us most of the time anyway and using touch input as a clutching mechanism,"he says."This now allows users to seamlessly(无缝地)interact across devices far and close in a very natural manner."While current eye-trackers are rather bulky,mainstream consumer devices are not too far away.Swedish firm Tobii is developing gaze-tracking technology that can be installed in laptops and tablets and is expected to be available to buy next year.And the Google Glass headset is expected to include eye-tracking in the future.Turner says he has also looked at how content can be cut and pasted or drag-and-dropped using a mix of gaze and taps on a touchscreen.The system was presented at the Conference on Mobile and Ubiquitous Multimedia in Sweden,last week. The eye-tracker technology enables us to______.
[多选题]共用题干 Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel(矿物燃 料),meaning that it is derived from orgaiiic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane(甲烷).2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure(基础设施)has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity.In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of new electricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits(发出)less pollution than other fossil fuel sources. When natural gas is burned , it produces mostly carbon dioxide(二氧化碳)and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted(燃烧)一making natural gas the clea-nest burning fossil fuel of all.4 The United States consumes about one一third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts that natural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG(液化天然气)has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import- ers of LNG are Japan,Korea,France and Spain. It is estimated that by 2025 natural gas demand in the United States will increase___________.