A.只有技師A說(shuō)得對(duì) B.只有技師B說(shuō)得對(duì) C.技師A和技師B說(shuō)得都對(duì) D.技師A和技師B說(shuō)得都不對(duì)
A.勵(lì)磁繞組 B.保持線圈 C.吸引線圈 D.前述都是
A.mV B.V C.kV D.μV