题目内容

凸轮从动件采用等速运动规律时存在刚性冲击。

A. 对
B. 错

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Write down the words for the opposite sex.(写出与下列单词性别相反的词。

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A. 箍筋
B. 下部纵筋
C. 支座负筋
D. 架立筋