KTSG——102型充电架上红、绿灯都不亮时说明（）有故障。
A、电源
B、电流
C、电压
参考答案：A
Look at the word"busy", there is _____"s" and _____"u" in it.
[ ]
A. a, a
B. an, an
C. a, an
D. an, a
中国公民一律适用中国法律。( )
