井口卸载煤仓必须设置（）保护。
A.箕斗到位
B.煤位信号
C.卸载
D.满仓
参考答案：D
Mr Li, there is someone in the next room _____ would like to speak with you.[ ]
A. he
B. who
C. which
D. whom
输气管线穿越铁路宜采用钢筋混凝土套管（）。
A.顶管施工
B.开槽施工
C.机械施工
D.排水施工
