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单选题
460.The ground Cart is running and switched on, the EXT PWR pushbutton is pressed in and there is no indication. What does that configuration mean ?
A
The GPCU is supplied and the EPC is open.
B
The GPCU is not supplied and the EPC is open.
C
The GPCU is supplied and the EPC is closed.
答案解析
正确答案：A
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