试题与答案

数据库设计分为以下6个设计阶段：需求分析阶段、 【4】 、逻辑设计阶段、物理设计阶段

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题型：填空题

题目：

数据库设计分为以下6个设计阶段：需求分析阶段、 【4】 、逻辑设计阶段、物理设计阶段、实施阶段、运行和维护阶段。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A解析： 工作M的自由差=工作N的最早开始时间-工作M的最早完成时间=工作N的最早开始时间-工作M的最早开始时间-工作M的持续时间=14～6-5=3(天)。

考点：计算机等级考试VISUALBASIC二级VISUALBASIC笔试
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