题目内容

负载△连接时,线电流等于相电流。( )

A. 对
B. 错

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三相电压的相序一般分为__。

A. 正序
B. 同序
C. 负序
D. 反序

The college students in China are _______ from smoking on campus because this will do them no good.

A. discouraged
B. observed
C. obeyed
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A. 一级价格歧视
B. 二级价格歧视
C. 三级价格歧视
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