试题与答案

在数据库设计中,将E-R图转换成关系数据模型的过程属于A.需求分析阶段 B.概念设计

题型:单项选择题

题目:

在数据库设计中,将E-R图转换成关系数据模型的过程属于

A.需求分析阶段

B.概念设计阶段

C.逻辑设计阶段

D.物理设计阶段

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析: 本题考查if else语句。第一个if语句,先判断条件,发现a<b成立,执行下列的复合语句,得 c=a*b=20,b、a的值不变。

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