试题与答案

一个人用脚步估测距离，他从教室到图书馆，24米的路程走40步，从他家门口走到学校

更新时间：2017-06-18 00:06来源：www.tikuol.com

题型：问答题

题目：

一个人用脚步估测距离，他从教室到图书馆，24米的路程走40步，从他家门口走到学校门口共需260步，求他家门口到学校门口的距离？

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：若关系模式R∈1NF，且对于每一个非平凡的多值依赖X→→Y，都有X包含码，则R∈4NF。

考点：速度公式及其应用

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