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单选题

WHEN ON "AUTO" POSITION, THE BUS TIE P/B ON THE ELEC CONTROL PANEL, ALLOWS:

AThe AC BUSES to be supplied in parallel by more than one generating source at the same time.

BThe AC BUSES to be supplied by any Main Generator, APU Generator or External Power.

CThe AC BUSES to be supplied by the APU Generator or EXT PWR only.

正确答案:A (备注:此答案有误)

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