断开液压电梯主电源开关前应尽可能将其轿厢停在（）层A.顶层 B._爱下问搜题

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问题单项选择题

断开液压电梯主电源开关前应尽可能将其轿厢停在（）层

A.顶层

B.底层

C.中间

D.任意位置

答案

参考答案：B

选择题

I like my history teacher because he often ______ us about many interesting events in history and he's

really humorous(幽默的). [ ]

A．says

B．tells

C．speaks

D．talks

单项选择题

术后需去枕平卧6小时的麻醉方式是

A．蛛网膜下腔阻滞麻醉

B．吸入麻醉

C．静脉麻醉

D．硬膜外阻滞麻醉

E．吸入麻醉