Sound travels ______ air ______ a speed of about 340 metres per second.A.over; i
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Sound travels ______ air ______ a speed of about 340 metres per second.A.over; in | B.through; at | C.by; at | D.through; over |
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答案
B |
解析
试题分析:over越过,在……之上;in在里面;through通过;at在一点;by通过某种方式,到……为止。句意:声音在空气中的传播速度大约是每秒340米。结合语境可知前文是通过空气的速度,下文表示在数字上的一点,故前一空用through,后一空用at,选B。 点评:英语介词的一个特点是一词多义,并且介词间语义交叉现象很多,习惯用法也很多,有时很难从词义上区分开来。故学习中要注意不断总结,熟记一些介词和动词的固定搭配用法及习惯用法,是完成此类问题的捷径。 |
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