题目内容
(请给出正确答案)
[单选题]
《规程》规定:采煤工作面最低允许风速为(),最高允许风速为()。
A.0.25m/s;8m/s
B.0.25m/s;4m/s
C.0.25m/s;2m/s
D.0.15m/s;4m/s
答案
查看答案
A.0.25m/s;8m/s
B.0.25m/s;4m/s
C.0.25m/s;2m/s
D.0.15m/s;4m/s