单选题
0分
A. send and 56 e-mail B. sources ranging 57 vast databases to small electronic "bulletin ...
A. send and 56 e-mail
B. sources ranging 57 vast databases to small electronic "bulletin boards"
C. Much of the Intemet's traffic consists 58 messages
B. sources ranging 57 vast databases to small electronic "bulletin boards"
C. Much of the Intemet's traffic consists 58 messages
参考答案: B
参考解析: range from...to...意为“范围是……”,故选B。