车站应按月清查（）的铁路箱，发现账实不符时，应查明原因，及时上报。
A.固定作业场地
B.车站内
C.货场内
D.站内外
参考答案：D
parents came to China last year. [ ]
A. The both of his
B. His both
C. Both of his
D. The both his
施工现场的氧气瓶、乙炔瓶存放安全距离不小于（）
A、5m
B、10m
C、2m
