煤矿安全规程》规定，高瓦斯矿井的绝对瓦斯涌出量应该为（）m3/min。
A、=40
B、>40
C、≤40
D、≥40
参考答案：B
连词成句
1. his, is ,book, this
___________________________
2. is, my, it, sharpener
We have to ______ the wall ______. [ ]
A. have; painted green
B. paint; green
C. get; to paint green
D. paint; to make green
