轿厢安全门或轿厢安全窗如果锁紧失效,该装置应使电梯停止。只有在重新锁紧后,电梯才有可能恢复运行。()
参考答案:对
Everybody likes to work with is reliable and easy to get along with.
A.who
B.whom
C.whomever
D.whoever
规定回收的采区煤柱,可作为独立块段进行损失率计算。