问题 填空题

数据库管理系统常见的数据模型有层次模型、网状模型和______3种。

答案

参考答案:关系模型

解析: 数据库管理系统是位于用户与操作系统之间的一层系统管理软件,属于系统软件,是用户与数据库之间的一个标准接口,其总是基于某种数据模型,可以分为层次模型、网状模型和关系模型。

阅读理解

第二部分阅读理解(共25小题;第一节每小题2分,第二节每小题1分,满分45分)

阅读下列短文,从每题所给的四个选项A、B、C、D中,选出最佳选项,并在答题卡上将该项涂黑。

A

The holiday is upon us. Finally, after months of study, you have some time to yourself. So, why not read a book? Well, some people will say, "Why bother with books? We have the Internet and other media that offer a lot more colorful entertainment. Books are history!" But don't be fooled. I'm sure there's still a lot to be said for reading.

One clear reason is that a well-chosen book is a wonderful source of vocabulary, so long as you have a good dictionary, of course. Believe me, it's far easier to get new English words and phrases from a book or an article than it is from the TV or the Internet.

But another more important point is that books give you something that modern media simply can not. The average webpage is picture-heavy and the text is often designed to make it as easy to read as possible. While "easy" may be attractive, unfortunately it's of little use for any long-term development of reading skills and the general language level. Because of that, there's still no substitute (替代品) of a book.

But perhaps the best single reason is that simply choosing what you read and doing it independently means that it's something you do by and for yourself. You can choose what you want to read. It's hard work, but somewhere down the line, you'll find that what once seemed like a duty is now a pleasure.

41.How many reasons for reading a book does the author mention in the passage?

A.Three         B.Two     C.One      D.Four

42.According to the passage, we basically need a ____ in reading.

A.television          B.pencil    C.notebook  D.dictionary

43.In the author's opinion, reading on the Internet may____.

A.develop long-term reading skills    B.improve the general language ability

C.not take the place of reading books   D.be an effective way of reading

44.The passage is written mainly to ____.

A.share the pleasure of reading books

B.advise readers to read books

C.stress the importance of reading online

D.help readers to choose good books

选择题