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【简答题】
●E-R图转换为关系模型时，对实体中的多值属性采用的方法是 (60)，得到的关系模式属于 (61)。 (60) A．将实体的码分别和每个多值属性独立构成一个关系模式 B．将多值属性和其它属性一起构成该实体对应的关系模式 C．多值属性不在关系中出现 D．所有多值属性组成一个关系模式 (61) A．2NF B．3NF C．BCNF D．4NF
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