2. 外语
  3. The speed______is 340 meters per second.

The speed______is 340 meters per second.

admin2019-05-15  79
问题 The speed______is 340 meters per second.
选项 A、at which sound travels
B、with which sound travels
C、of which sound travels
D、for which sound travels
答案A
解析 本题考查定语从句。句意：声音传播的速度是每秒340米。首先确定引导词用which，如果介词不前置的话，句子的顺序应该是the speed which sound travels at。与speed搭配的是介词at，故本题选A。
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成人本科学位英语

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