题目内容

电压表可以直接测量电源电压

A. 对
B. 错

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串联电路总电压等于各部分电路两端电压之和。

A. 对
B. 错

电压表使用之前不需要校零

A. 对
B. 错

Text A can be divided into three parts with the paragraph number(s) of each part provided as follows. Match the main idea of each part.

Text A can be divided into four parts. Match each part with the right maid idea.