试题与答案

His heavy drinking and fond of gambling, m

题型:单项选择题

题目:

His heavy drinking and fond of gambling, makes him a poor role model.

A.and fact that he gambles

B.and that he gambles

C.and he gambles which

D.and gambling

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:空气动力噪声,是由于气体压力变化引起气体扰动,气体与其他物体相互作用所致。例如,各种风机、空气压缩机、风动工具、喷气发动机和汽轮机等,由于压力脉冲和气体排放发出的噪声。

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