石门在近距离煤层群中，层间距小于（）或者层间岩石破碎时，应测定（）的瓦斯压力。
参考答案：5m，各煤层
— Why not do your homework for a while?
— _____ There's too much homework today. Let's finish it first. [ ]
A. I'm afraid that's not a good idea.
B. What a good idea!
C. Great.
D. Thank you.
宏观经济学
