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问题 多项选择题

楼梯段宽度应根据（）等因素确定。

A.设计人流股数

B.投入的资金

C.防火要求

D.建筑物的使用性质

9.屋顶的设计要求包括（ABC.

答案

参考答案：A, C, D

选择题
— I have tried very hard to find a solution to the problem, but in vain.
— Why not consult with Frank? You see, _____.

A. great minds think alike
B. two heads are better than one
C. a bird in the hand is worth two in the bush
D. it's better to think twice before doing something
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选择题

下列行为与防御行为有关的是（   ）

A．猎豹追逐羚羊

B．乌贼释放墨汁

C．公鸡打鸣

D．狐狸的臊味
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