单选题:某一级耐火等级建筑中观众厅为阶梯地面,容纳200个座位,允许疏散时间为2min,假设单股人流宽度为0.55m,则该观众厅

题目内容:

某一级耐火等级建筑中观众厅为阶梯地面,容纳200个座位,允许疏散时间为2min,假设单股人流宽度为0.55m,则该观众厅的安全出口疏散总宽度不应小于(  )m A.1.0
B.1.5
C.2.0
D.2.5

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