理工C题库

单选题 1.00分

　　

  • A.Tobacco stocks also perked up as investors discounted fears of litigation(诉讼) from the US 　　
  • B.So far，109 countries have signed it, and 12 have ratified it. 　　
  • C.The impact of the treaty could be hug
  • D.Countries that ratify(批准) it would be required to enact strict tobacco control policies. 　　
  • E.The treaty calls for higher tobacco taxes, restrictions on smoking in public places, and more promotion of tobacco prevention and cessation programs. 　　
  • F.The Senate must still approve the treaty before the US can implement its provisions.
进入题库练习

你可能感兴趣的试题

1 单选题 1.00分
大学生利用课余时间打工
　　the future of press
　　Can you hear This?
　　When something creates a sound wave in a room or an auditorium, listeners hear the sound wave directly from the source. They also hear the reflections as the sound bounces off the walls, floor, and ceiling. These are called the reflected wave or reverberant(反射的)sound, which can be heard even after the sound is no longer coming from the source.
　　The reverberation time of an auditorium is determined by the volume or interior size of the auditorium. It is also determined by how well or how poorly the walls, ceiling, floor, and contents of the room (including the people) absorb sound. There is no ideal reverberation time. Because each use of an auditorium calls for different reverberation. Speech needs to be understood clearly: therefore rooms used for talking must have a short reverberation time. The full-sound performance of music such as Wagner operas or Mahler symphonies should have a long reverberation time. The light, rapid musical passages of Bach or Mozart need a reverberation time somewhere between.
　　Acoustic problems often are caused by poor auditorium design. Smooth, curved reflecting surfaces create large reflections. Parallel(平行的)walls reflect sound back and forth, creating a rapid, repetitive pulsing effect. Large pillars(柱)and corners can cause acoustic shadows as the sound waves try to pass around the object. Some of these problems can be solved by using absorbers and reflectors to change the reverberation time of a room. For example, hanging large reflectors, called clouds, over the performers will allow some sound frequencies to reflect and others to pass to achieve a pleasing mixture of sound.
文章(1~5)

This passage is mainly about_____
　
  • A.sound waves and their effects.
  • B.the types of music orchestras play.
  • C.walls of an auditorium.
  • D.the design of an auditorium.
2 单选题 1.00分
Wagner operas and Mahler symphonies with full-sound effect have_____
  • A.a short reverberation time.
  • B.an intermediate reverberation time.
  • C.no reverberation time.
  • D.a long reverberation time.
3 单选题 1.00分
This passage suggests that a good auditorium should_____
  • A.get rid of all reflections.
  • B.not have absorbers.
  • C.achieve a pleasing mixture of sound.
  • D.have smooth surfaces.
4 单选题 1.00分
Large pillars and corners may_____
  • A.make sound rich and full.
  • B.be cures for sound problems.
  • C.be sources of sound problems.
  • D.function as effectively as clouds.
5 单选题 1.00分
The word "acoustic" in the last paragraph has something to do with_____
  • A.performance.
  • B.sound.
  • C.audience.
  • D.weather.
千题库百度小程序 百度扫一扫练题
千题库公众号二维码 关注千题库公众号

理工C-题库

下载App
进入题库

相关试卷

2022年《理工C》模拟卷2
2022年《理工C》模拟卷3
2022年《理工C》模拟卷1
2022年《理工C》模拟卷4
2022年《理工C》模拟卷5
2022年《理工C》模拟卷6
2022年《理工C》预测卷1
2022年《理工C》预测卷2
2022年《理工C》预测卷3
2022年《理工C》预测卷4
2022年《理工C》预测卷5
2022年《理工C》预测卷6