为防止在发电机的转子上产生高的静电电压，应在汽侧轴上装置接地

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问题填空题

为防止在发电机的转子上产生高的静电电压，应在汽侧轴上装置接地电刷，一般可经过（）Ω的电阻接地。

答案

参考答案：100～300

选择题

_____ the people present, I _____ without a word. [ ]

A. If it were not; go

B. Were it not for; would go

C. weren't it for; would go

D. If it hadn't been; would have gone

填空题

钢卡箍或支臂变形时，允许（）。对易折断的材料可不作校正，但不应影响使用。