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【单选题】
我国采用的围生期是指A.
从胚胎形成到产后4
B.
从妊娠满20产后4
C.
从妊娠满28产后1
D.
从妊娠满28产后4
E.
从妊娠37产后1
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【简答题】完形填空。 I was sure that I was to be killed. I became terribly nervous. I searched in my pockets to see if there were any cigarettes, which had 1 their search. I found 2 and because of my shaking hands, ...
【简答题】I was sure that I was to be killed. I became terribly nervous. I fumbled (searched) in my pockets to see if there were any cigarettes, which 1 their search. I found 2 and because of my shaking...
【单选题】I searched for my wallet and it wasn't thereI thought I______it at home.
A.
left
B.
have left
C.
might have left
D.
could have left
【简答题】完形填空。 I was sure that I was to be killed. I became terribly nervous. I fumbled (searched) in my pockets to see if there were any cigarettes, which 1 their search. I found 2 and because of my shaking h...
【单选题】在下列多边形 M 和多边形 N 的空间关系中,哪种不属于拓扑关系的范畴:( )
A.
M位于 N 的西北方向
B.
M位于 N 的内部
C.
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D.
M 与 N 重合
【单选题】I have searched my mind______vain for a polite way to tell that reader to go to hell.
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in
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on
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A.
双反星形为两组三相半波并联，且需用平衡电抗器，每组三相半波整流电路各承担负载平均电流的1/2，整流变压器不存在直流磁化现象。
B.
双反星形为两组三相半波并联，且需用平衡电抗器，每组三相半波整流电路各承担负载平均电流的1/2，但整流变压器存在直流磁化现象。
C.
双反星形为两组三相半波并联，且需用平衡电抗器，每组三相半波整流电路各承担负载平均电流的1/2，不需要整流变压器。
【单选题】某书店管理系统使用(书号,书名,作者,出版社,出版日期,库存数量......)一组属性来描述“图书”,宜选(59)作为主键。
A.
书号
B.
书名
C.
作者
D.
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【单选题】某书店管理系统用(书号,书名,作者,出版社,出版日期,库存数量......)一组属性来描述“图书”,宜选____作为主键。
A.
书号
B.
书名
C.
作者
D.
出版社
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