新版输气工（初级）

AD007三相交流电与单相交流电的优点比较 ,下列说法错误的是() 。

发布于 2021-04-19 22:41:53

【单选题】
A 同样尺寸的三相发电机、电动机和变压器功率比单相的小
B 同样尺寸的三相发电机电动机和变压器功率比单相的大
C 同样的输电条件、三相电路可省输电材料
D 三相交流电动机性能比单相的好

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