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单选题
531.交流勤务汇流条可由什么供电( )The AC GRND FLT BUS is powerd by( )
A
仅地面电源A External power A only
B
仅飞机电网 plane electricity worknet
C
飞机电网和地面电源A plane electricity worknet and external power A
答案解析
正确答案：C
解析：
题目解析
交流勤务汇流条可由什么供电？答案是C. 飞机电网和地面电源A。交流勤务汇流条通常是由多种电源供电的，包括飞机电网和外部地面电源。这有助于确保系统在不同的电源可用性情况下都能正常运行。
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