A.3/4
B.2/3
C.7/12
D.1/2
[单选题]A.B.C.D.
[单选题]A.3/4B.2/3C.7/12D.1/2
[单选题]A.空气内循环B.空气外循环C.迎面吹风D.风窗玻璃除霜
[单选题]A.充电电流过大B.蓄电池损坏C.电流表故障D.充电电路故障