A.電壓 B.電流 C.電機(jī)軸 D.功率因素
A.110 B.120 C.130 D.140
A.40% B.50% C.60% D.70%
A.0 B.0.5 C.0.75 D.1
A.大于500 B.大于1000 C.大于是500 D.大于2000