A.0 B.60 C.120 D.180
A.θ=α B.θ+α=180 C.θ+α=120 D.θ+α=360
A.電壓調(diào)整率 B.輸出電壓相對諧波含量(亦稱為輸出電壓失真度) C.負載效應(yīng)(亦稱負載調(diào)整率) D.負載功率因數(shù)