一级消防工程师防烟排烟系统单项选择题每日一练(2017.07.14)

A.70
B.100
C.160
D.280

A.5
B.7
C.10
D.15

A.每隔4～5层
B.每隔2～3层
C.每隔6～7层
D.每层

A.7
B.10
C.15
D.20

A.2
B.3
C.4
D.6