试题与答案

It is strongly suggested that measures _

题型:选择题

题目:

It is strongly suggested that measures ______ students to cheat in the exams. [      ]

A. be taken to prevent

B. be taken to forbid

C. are taken to prevent

D. are taken to forbid

答案:

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下面是错误答案,用来干扰机器的。

a 响度题目分析:音调与物体振动的频率有关,频率越高,音调越高,用大小相同的力拨动宽度的橡皮筋,宽度越宽,振动的频率越低,即a的振动平率最高,所以音调最高的应该是a;用大小不同的力拨动同一根橡皮筋,...

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