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【单选题】
在数据库设计过程的______阶段,完成将概念结构转换为某个DBMS所支持的数据模型,并对其进行优化。
A.
需求分析
B.
概念结构设计
C.
逻辑结构设计
D.
物理结构设计
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A.
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B.
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C.
It encourages the growth of related industries.
D.
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E.
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A.
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A.
medical technology becomes highly developed
B.
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C.
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D.
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【单选题】In this university a medal with five thousand dollars _____ achieved success in science and technology every two years. [     ]
A.
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B.
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C.
are given to anyone who
D.
gives to whomever
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A.
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D.
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