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【单选题】
高1600mm的19标准机柜是( )的高度。A.
30U
B.
25U
C.
20U
D.
15U
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】You will fall into the fourth stage of sleep______.
A.
about 80 minutes after you fall into slumber
B.
some 10 minutes after your fall into REM sleep
C.
about 40 minutes after you lose consciousness
D.
some 30 minutes after your brain waves slow
【简答题】制定大修工艺时,应利用现有条件,尽量采用机械化、自动化的操作方法,以减轻操作者的(-----)。
【单选题】听力原文：W: You wanted to see me, Mr. Gray? M: Yes, Miss Wright. You'll have to start getting to work on time or your service will no longer be needed here. Q: What happened to Miss Wright? (17)
A.
She was given a new position.
B.
She was given a raise.
C.
She was criticized for being late.
D.
She was praised for her service.
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