A.±3% B.±1.5% C.1.0~1.5% D.0.2~0.5%
A.各負(fù)載電流相等 B.各負(fù)載上電壓相等 C.各負(fù)載電壓電流均對(duì)稱(chēng) D.各負(fù)載阻抗相等
A.相同 B.相反 C.相同或相反均可 D.無(wú)規(guī)定