单选题:在数据库设计中,将E—R图转换为关系模式的过程属于(  )。

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在数据库设计中,将E—R图转换为关系模式的过程属于(  )。 A.需求分析阶段
B.逻辑设计阶段
C.概念设计阶段
D.物理设计阶段

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