题目内容

在设计时使机器中受激振作用的各零件的固有频率f与激振源频率fp一致。

A. 对
B. 错

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机械零件的良好结构工艺性，是指零件在既定的生产条件下能方便而经济地生产出来，并便于装配成机械的特性。

A. 对
B. 错

强度准则就是要求零件在预定的工作期限内，能保持正常工作而不致失效。

A. 对
B. 错

The art of movement is among the oldest of the arts，which is not really surprising, for so much about us is ________ perpetual motion.

A. to
B. with
C. in
D. on

It can be said that the adoption ________ shifting perspective is one of the characteristics of Chinese painting.

A. by
B. of
C. in
D. with