锋面气旋。

矿井瓦斯等级按照平均日产（）吨煤涌出瓦斯量分为低、高和煤与瓦斯突出矿井。

A.1

B.2

C.3

— We decided ______ trees on the hill, but we haven't decided how to get there.

— Let's go by bike, ______? [ ]

A. to plant; shall we

B. to plant; will you

C. planting; shall we

D. planting; won't you

对于中止犯，没有造成损害的，应当从轻处罚。( )

滑动破坏形式（）

植物检疫法规由（）发展。