题目内容

零件越粗糙磨损越慢。

A. 对
B. 错

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表面粗糙度对零件结合的密封性没有影响。

A. 对
B. 错

Ra比RZ更能反映表面粗糙度的实际情况。

A. 对
B. 错

Marshall Reed doesn’t enjoy eating fresh veggie omelets because he is tired of everyday cooking.

A. 对
B. 错

According to a new report, obesity is believed to be the direct cause of about 18% of deaths.

A. 对
B. 错