货物列车列尾装臵尾部主机的安装与摘解，由（）负责。
A.车辆部门
B.车务部门
C.列检部门
D.机务部门
参考答案：B
It was the training _______ he had at school _______ made him a good jumper. [ ]
A. what; what
B. that; that
C. what; that
D. that; had
坎儿井水量最大应该在[ ]
A．5月
B．6月
C．7月
D．8月
