Therearealotofcomputersinthela

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更新 2022-09-03
科目英语
题型单选题
难度较易
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挑错有奖

There are a lot of computers in the lab,and they need professional __________ to make sure they can be in a good state.

A．operation

B．maintenance

C．service

D．advice

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相关试题

The folk song concert was so well _______ that all the tickets had been sold out on the first day.

A．accepted

B．recognized

C．received

D．promised

题型：未知
难度：未知

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—I’ll join the music club ________ Mary is in the club, too.
—You mean if Mary joins the club you’ll do, too.

A．in case

B．so that

C．now that

D．on condition that

题型：未知
难度：未知

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Bears often hide themselves in places ________ can’t be found by hunters.

A．in which

B．where

C．that

D．不填

题型：未知
难度：未知

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When I turned to the person ________ next to me, I recognized that he was my schoolmate.

A．seating

B．being sat

C．sit

D．seated

题型：未知
难度：未知

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Of all the books on the desk, ________ is of any use for our safety.

A．nothing

B．no one

C．neither

D．none

题型：未知
难度：未知

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