单项选择题
根据《公路隧道消防技术规程》,长度大于()二级公路隧道和长度超过()其它公路隧道应设置机械防烟排烟系统
A.1500m,1000m
B.1300m,800m
C.1100m,700m
D.1000m,500m
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单项选择题
A.1500m,1000m
B.1300m,800m
C.1100m,700m
D.1000m,500m
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