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单选题
735、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.
答案解析
正确答案：B
相关知识点：
紧急出口门，用于疏散非出口
