问题
单项选择题
《烟草建筑设计防火规范》规定，建筑高度为42米，每层工作人数为20人的烟草生产厂房的疏散楼梯应采用（）或室外楼梯
A.敞开楼梯间
B.剪刀楼梯间
C.封闭楼梯间
D.防烟楼梯间
答案
参考答案：D
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《烟草建筑设计防火规范》规定，建筑高度为42米，每层工作人数为20人的烟草生产厂房的疏散楼梯应采用（）或室外楼梯
A.敞开楼梯间
B.剪刀楼梯间
C.封闭楼梯间
D.防烟楼梯间
参考答案：D
| 情景交际。 | |
| Sam: Hi, Joan, __1__? Joan: It was pretty great. Sam: __2__? Joan: No, I didn't. __3__. Look, here are my photos. Sam: __4__? Joan: No, there weren't any sharks, but there were really clever seals. Sam: Wow, __5__. What else did you do? Joan: Well, I had a long walk with my friends and took lots of beautiful photos.
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