题目内容

在三相四线制的星形联接中,中线的作用是( )。

A. 构成电流回路
B. 获得两种电压
C. 使不对称负载的相电压对称
D. 使不对称负载的功率对称

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1. Her father cut off her a_______ soon after she turned 18.

2. He answered the reporters' questions f________.

3. They avoid all luxuries and live a very f_______ life.

4. Don't i_______ in what doesn't concern you.

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