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【简答题】
完整的磁盘文件名由 和 组成。
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举一反三
【单选题】The CEO said that it would never be late to apologize for its poor service.
A.
much
B.
too
C.
so
D.
very
【单选题】【真题链接 】 2016 年 12 月 32. The CEO said that it would never be late to apologize for its poor service.
A.
much
B.
too
C.
so
D.
very
【单选题】下图是海河流域某地局部等高线地形图。 3(2019湖南重点名校4月联考,3)当M乡人在秋分日看到太阳升起时,太阳位于 ( )
A.
正北方
B.
.正东方
C.
东北方
D.
东南方
【简答题】按用户的观点来对数据和信息建模,用于数据库设计的一类数据模型称为 。
【单选题】______as it was at such a time, his work attracted much attention.
A.
Being published
B.
Published
C.
Publishing
D.
To be published
【单选题】按用户的观点来对数据和信息建模的模型称为( )
A.
逻辑模型
B.
概念模型
C.
物理模型
D.
关系模型
【简答题】关系中外码的值必须取空值,或等于被参照关系中某个元组的主码值, 这条规则称为 完整性规则 。
【简答题】________ as it was at such a time, his work attracted much attention. A) Being published B) Published C) Publishing D) To be published
【单选题】铝液的比重要比电解质的重,一般两者相差( )g/cm3。
A.
0.05
B.
0.2
C.
0.4
D.
0.6
【判断题】热继电器在电路中既可以短路保护,又可作过载保护( )
A.
正确
B.
错误
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