It's 7 o'clock now. Tom dinner at home. [ ]
A. is having
B. has
C. have
D. having
A
“节奏”性
容量为10kVA的单向照明变压器,电压为3300/220V,欲在副边接上60W、220V的白炽灯,若使变压器在额定情况下运行,原边电流值最接近于( )A。
A.2.05 B.4.08C.2.65 D.3.03