【单选题】
何时整个应急照明系统由EPSU内的电瓶供电___
A. 当驾驶舱里MEMER．EXIT．LTN选择器放在”0N”位．
B. 当FAP里”EMERLIGHT”按钮按压后．
C. 当驾驶舱里”EMEREXITLT”选择器放在”ARM”位且28VACESSBUS1断电ESSBUS断电．
D. 当驾驶舱里”EMEREXITLT”选择器放在”ARM”位且115VACBUS1断电．
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答案
C
解析
暂无解析
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飞机电源系统正常的情况下，将驾驶舱应急灯开关放在ON位，则供给应急灯的电源是：___
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【单选题】
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