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【多选题】
机械排烟系统的设计应符合的原则是________。A.
走道的机械排烟系统宜竖向设置，房间的机械排烟系统宜按防烟分区设置
B.
防烟分的排烟口距最远点的水平距离不应超过20m
C.
排烟口应设在顶棚上或靠近顶棚的墙面上。设在顶棚上的排烟口，距可燃构件或可燃物的距离不应小于2．00m
D.
机械排烟系统中，当任一排烟口或排烟阀开启时，排烟风机应能自动起动
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皮皮学刷刷变学霸
举一反三
【单选题】Which are correct descriptions about Xi’an?
A.
It used to be the capital of the Ming Dynasty.
B.
It is in the eastern coast of China.
C.
The starting point of Zhang Qian’s mission
D.
It is the ancient city where Emperor Wu started to build the Great Wall.
【单选题】Which are correct descriptions about Xi’an?
A.
It used to be the capital of the Ming Dynasty.
B.
It is in the eastern coast of China.
C.
the starting point of Zhang Qian’s mission
D.
It is the ancient city where Emperor Wu started to build the Great Wall.
【简答题】Xi’an is the eastern terminus of the Silk Road and home to the Army of Emperor Qin Shi Huang. 西安是丝绸之路在东方的起点和秦始皇兵马俑的所在地。
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