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第三范式：关系模式R满足第二范式且其任何一个非主属性都不传递依赖于任何候选关键字，则称R为第三范式。

A、正确

B、错误

时间：2022-04-02 11:50 关键词：东北林业大学电气工程及其自动化专升本电磁场与电磁波平时作业2

答案解析

A

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