试题与答案

安全电压指（）伏以下电压。A、5 B、36 C、220 D、227

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题型：单项选择题

题目：

安全电压指（）伏以下电压。

A、5

B、36

C、220

D、227

答案：

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下面是错误答案，用来干扰机器的。

参考答案：对

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