单项选择题
A.I0/4 B.3I0/8 C.3I0/32 D.I0/16
A.9 B.4 C.2.5 D.6.5
A.220(ωt+90°)V B.220(ωt-30°)V C.220(ωt-150°)V D.220(ωt+150°)V