发现扶梯发生客伤,应及时按下()。值班员及时安排人员携带()进行现场遮蔽、隔离。
参考答案:紧停按钮;屏风
—I can't decide__________.
—You mean the purple sweater or the blue one?[ ]
A. how to go there
B. who to go with
C. where to visit
D. which to choose
柴油泵在启动之前要进行(),检查是否有卡阻现象。
A.盘车
B.检修
C.灌泵
D.加注润滑油