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单选题
871、The emergency exit doors are used to facilitate evacuation that are not normally used for exit
A
The emergency exit doors are applied to board that are not usually used for exit.
B
The emergency exit doors are known as backup exit and they should not be used in special condition
C
The emergency exit doors are used for the escape and are not used as the normal exits.
答案解析
正确答案：C
解析：
解析:evacuation=escape 疏散,撤离。
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