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【单选题】
下列选项中,不属于城市热转换设施中热力站的作用的是 ( )
A.
将热量从局部系统内转移到热网
B.
供热管网和热用户的连接场所
C.
将热媒加以调节和转换
D.
在蒸汽供热系统中,收集凝结水并回收利用
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【单选题】The reason for his being late is _______his bicycle went wrong on the way.
A.
because
B.
that
C.
why
D.
for which
【单选题】Even many years after his divorce, he still couldn’t figure out the reason for his ____ marriage.
A.
to fail
B.
to be failing
C.
failing
D.
failed
【单选题】The reason for his absence from school was ____ he fell ill.
A.
because
B.
why
C.
what
D.
that
【单选题】What did the doctor think was the reason for his trouble?
A.
He has been sitting too much.
B.
He has been working too hard in his office.
C.
He has been watching too much of TV.
D.
He has been eating too much.
【单选题】The reason for his success is ______ he worked very hard.
A.
why
B.
that
C.
whether
D.
how
【单选题】Being late was the reason for his layoff.
A.
denied in
B.
admitted to
C.
erected in
D.
assigned as
【单选题】关于主键描述正确的是
A.
包含一列
B.
包含两列
C.
包含一列或者多列
D.
以上都不正确
【单选题】心室颤动电除颤应首选直流电()
A.
150J非同步除颤
B.
200~300J同步除颤
C.
200~360J非同步除颤
D.
360J同步除颤
E.
360J非同步除颤
【单选题】Which of the following was not the reason for his running away from home?
A.
The money his father gave him was meager.
B.
He did not reach a consesus with his parents on whether to go to college or not
C.
He  thought the work on the farm was meaningless and boring.
D.
He was very angry because his father gave him a good beating.
【单选题】关于主键描述正确的是:
A.
一张表中只能有一个主关键字
B.
一张表中可以有多个主关键字
C.
主关键字的列值可以重复
D.
以上都不正确
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