问题 填空题

元组的每个分量必须是不可分的数据项这叫做  【17】  

答案

参考答案:(17) 第一范式

解析:【命题目的】本题主要考查了对第一范式的理解。
【解题要点】元组的每个分量必须是不可分的数据项这叫做第一范式。
【考点链接】掌握对函数依赖的理解。

单项选择题 A3型题
阅读理解

Most of us are the only child in our family. We have no brothers or sisters. Our family mainly consists of our mom,our dad and us. We are growing up in a world differently from our parents’. And we will be the future leaders of China. Some day we have to work hand in hand with each other and make China more and more beautiful. So we must learn to love each other like brothers and sisters.

It’s hard to think how difficult life would be if we had a sibling(同胞,手足).We never have to share anything at home. Of course, we might have cousins, but we don’t have to live with them! Our parents try to give us the best, and the best doesn’t need sharing between two or three children. Do we ever ask ourselves if we are (宠坏) spoiled?

A recent study has found that many children don’t know how to love others! We don’r know the value of money. We don’t know how hard our parents are to support us. We don’t want others to regard us as spoiled, do we? Well, why not start now to help our parents at home, share a game with one of our friends or value the opinions of our classmates, even if we don’t always agree? In a word, we must learn to love each other!

小题1:The underlined phrase “consists of ” means ____________in Chinese.

A.由...组成

B.由...反映

C.由...提示

D.由...覆盖小题2:As Chinese teenagers, what’s our duty in the future?

A.To save money

B.To learn to love each other

C.To look after our brothers and sisters

D.To make China more and more beautiful小题3:Why do some people think we are spoiled?

A.We don’t know how to love each other

B.We only share games with our friends

C.We don’t know how to use money

D.Our parents work hard to support us.