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【单选题】
The emergency exit doors are used to facilitate evacuation （疏散）that are not normally used for exit 紧急出口门用于方便疏散，通常不用于出口
A.
The emergency exit doors are known as, backup exit and they should not be used in special condition
B.
The emergency exit doors are used for the escape and are not used as the normal exits.
C.
The emergency exit doors are applied to board that are not usually used for exit.
参考答案：
参考解析：
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举一反三
【单选题】如果仅有1个位于隔离间机组处的紧急出口，隔离门应该（）.
A.
除了紧急情况和落地外，在所有的时间都锁上
B.
除了在机长宣布紧急情况下外，门一直锁上
C.
在每次起飞和着陆期间，这个门应当闩在开启位置