问题 单项选择题

下列关于计算机网络特征的描述中,错误的是( )。

A) 联网的计算机想要相互通信,必须使用相同的网络协议
B) 计算机网络可以分为广域网、局域网、城域网
C) 联网计算机既可以联网工作也可以脱网工作
D) 联网计算机必须使用统一的操作系统

答案

参考答案:D

解析: 使用相同的协议才能保证计算机之间的正常通信,按照网络覆盖范围能够划分网络为3大类:广域网、城域网以及局域网。网内计算机既可以在网络中使用,也能够断网独立运行。并不需要使用统一的操作系统。所以选项D)错误。

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Dear Boris,

1   

After I had spent a week with my English family, I slowly began to understand their English a little better.    2   Students in my group are from different cities of Britain and their dialects are different too!  Some of their accents are quite strong and they also have their own words and expressions.

3    Before I came to England I had thought that fish and chips were eaten every day.  That’s quite wrong!  I get rather annoyed now when I hear all the foolish words about typical English food.

I had expected to see “London fog”.  Do you remember our texts about it? We had no idea that most of this “thick fog” disappeared many years ago when people stopped using coal in their homes.  But the idea to speak about weather was very helpful.   4  On the other hand, habits are different.  People tell me what is typical British here in London is not always typical in Wales or Scotland.   5  

But what is ordinary for all British is that they follow traditions(传统).  Probably Britain has more living signs of its past than many other countries.  And people have always been proud of having ancient (古老的) buildings in capitals, big cities and the countryside.

I will tell you more about Britain in my other letters.

Love from Britain.

A.The weather in London is really changeable.

B.I have difficulty in understanding my classmates.

C.Thanks for your nice letter.

D.The family I live with are friendly.E. It’s very different from what I learned at school.

F. Local habits and traditions are not the same as what we knew.

G. But it’s not the language that’s different and surprising.

选择题