- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
薄煤層開采系列高為（）m
A.0.5~1.4
B.0.8~1.2
C.1~1.5
D.1~1.8
A.0.5~1.4
B.0.8~1.2
C.1~1.5
D.1~1.8
