下列关于E-R图向关系模式转换的描述中,正确的是______。

A、一个多对多的联系可以与任意一端实体对应的关系合并
B、三个实体间的一个联系可以转换为三个关系模式
C、一个一对多的联系只能转换为一个独立的关系模式
D、一个实体型通常转换为一个关系模式
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正确答案:

D

答案解析:

暂无解析

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