A.中性點(diǎn)電阻 B.中性點(diǎn)電抗 C.中性點(diǎn)電容 D.其他三個(gè)選項(xiàng)都不是
A.電壓 B.電流 C.無(wú)功 D.潮流
A.500 B.330 C.220 D.110