A.5 B.10 C.15 D.100
A.4 B.16 C.32 D.64
A.25 B.50 C.100 D.200
A.线电压380V,相电压220V B.相电压380V,线电压220V C.将380V电压变压成220V电压 D.电压最大值为380V,电压有效值为220V