鼻窦中以（）容积为最大。
A.额窦
B.上颌窦
C.蝶窦
D.乙状窦
E.筛窦
参考答案：B
We bought the big house with the saving we had. for several years.
A．put aside
B．put off
C．put down
D．put in
立井井筒检查孔距井筒中心不得超过（）m，且不得布置在井筒范围内。
A.25
B.30
C.35
D.40
