问题 单项选择题

计算机网络系统与分布式系统之间的区别主要是

A.系统物理结构

B.系统高层软件

C.传输介质类型

D.服务器类型

答案

参考答案:B

解析: 分布式系统与计算机网络的主要区别不在它们的物理结构上,而是在高层软件上。分布式系统是一个建立在网络之上的软件系统。这种软件保证了系统高度的一致性与透明性。分布式系统的用户不必关心网络环境中资源的分布情况,以及联网计算机的差异,用户的作业管理与文件管理过程对用户是透明的。

阅读理解

How the iron of tomorrow (the first Self Clean Iron)can change your lifestyle today?

General Electric introduces the iron of tomorrow. The iron can clean itself. Inside where irons get dirty. Because it cleans itself each and every time you empty it.How? With a push of a magic blue button.

The magic blue button.The first thing you’ll notice that’s different about this iron is the blue button on the side. It’s marked “Self Clean”. Push this blue button, and you can wash out loose mineral deposits  that remain and block up inside. Push this button, and you’ve made life a lot easier.

Less chance of brown spotsSure, Self Cleaning Iron is going to cut down on brown spots. (Those ugly spots that happen on nice, cleanly pressed clothes.) Because a Self Cleaning Iron becomes clean each time you press that magic blue button.Steams much longerCommon sense tells you that if you’ve an iron that blocks less often it has to stay younger for a long period of time. In other words, it steams much longer. That’s another joy of owning General Electric’s Self Cleaning Iron.What does it mean to youToday you are doing so much more than just running a house and running after the kids. You’re working. You’re going to school. It’s all part of your lifestyle. The iron can change that lifestyle. By giving you less trouble before you iron. If we can make it easier for you to be a better wife, a better mother, a better housemaker, we want to. The new Self Cleaning Iron is another one of Home-Makers from General Electric.

Lifestlye.We’re with yours. GENERAL ELECTRIC

9.This passage is ______.

A.an introduction to General Electric     B.an operating instruction of Self Cleaning Iron

C.an advertisement of Self Cleaning Iron  D.a description of the change of lifestyle

10.This iron can clean itself by ______.

A.empting itself                       B.washing out mineral deposits 

C.blocking up mineral deposits          D.giving off more steam

11.According to the passage, what is most likely to attract the customers?

A.It is made by General Electric.            

B.The iron will not produce mineral deposits.

C.There will be fewer brown spots on pressed clothes.

D.Their clothes will be cleaned at the same time.

12.Self Cleaning Iron can help change your lifestyle because ______.

A.you can run your house better         B.you don’t have to run after the kids

C.you can use it while you are working    D.we want you to be a better housemaker

单项选择题