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单选题
THE AMBER OPEN LIGHT ON THE REFUEL/DEFUEL PANEL:
A
Illuminates when all three refuel valves are open.
B
Illuminates when the defuel / transfer valve is open.
C
Illuminates if either engine LP valve is open during refueling.
答案解析
正确答案：B
解析：
THE AMBER OPEN LIGHT ON THE REFUEL/DEFUEL PANEL: A.Illuminates when all three refuel valves are open. B.Illuminates when the defuel / transfer valve is open. C.Illuminates if either engine LP valve is open during refueling. 答案:B
解析：这道题涉及到加油/泄油面板上的琥珀色"OPEN"指示灯。该指示灯在泄油/转移活门打开时亮起。因此，正确答案是B.Illuminates when the defuel / transfer valve is open.
