【单选题】
从星形和三角形的等值条件可知，要使两电路的任意两端点间的电压相等，流经对应点的电流相等，必须使两电路任意两端点间的___相等。
A. 电容；
B. 电感；
C. 电阻；
D. 电压；
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答案
C
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【单选题】
星形连接和三角形连接的互换，必须按照任意两对应端间的___等值条件进行。
A. 电流大小相等，方向相反；
B. 电压大小相等，方向相同；
C. 电流大小相等，方向相同；
D. 电压大小相等，方向相反；
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