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单选题
在地面，当探测到 APU 火警时，APU 自动关车。( )秒后，APU 灭火瓶自动向APU 舱释放海伦灭火剂。On the ground, when a APU fire is detected, the APU automatically shuts off. ( ) seconds later, Halon fire extinguishing agent will be automatically released to APU compartment.
A
5.0
B
10.0
C
15.0
D
20.0
答案解析
正确答案：A
题目纠错
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