接班时，询问上一班工作面放煤情况、（）完好情况或检修情况。
A.皮带
B.支架
C.板输送机
D.采煤机
参考答案：B
The people you find most diffcult can also be your most valuable teachers.
A．dealing with
B．to be dealt with
C．to deal with
D．being dealt with
树木冬天生长得慢，主要原因是有机物的合成减少或停止引起的。[ ]
