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问题 解答题

甲乙两盒中各有一些小球，如果从甲盒中拿出10个放入乙盒，则乙盒球就是甲盒球数的6倍，若从乙盒中拿出10个放入甲盒，乙盒球数就是甲盒球数的3倍多10个，求甲乙两盒原来的球数各是多少？

答案

设甲盒原来有x，乙盒原来有y盒，

由题意得，

6(x-10)=y+10
3(x+10)+10=y-10
，

解得：

x=40
y=170
．

答：甲乙两盒原来的球数为40个，170个．

单项选择题

设备监理机构的设备工程项目信息管理制度所必须考虑的内容不包括( )。

A．信息流程

B．信息的概念

C．信息类别和信息清单

D．各部门在信息管理方面的责任规定
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单项选择题

Many people are surprised when they find the Internet(因特网)was set up in the 1960s. At that time, computers were large and expensive. Computer networks(网络) didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system (系统) had to be set up. It should be good enough to be used by many different computers. If a part of the network was not working, information could be sent through another part. In this way computer network system would keep on working all the time.
At first the Internet was only used by the government, but in the early 1970s,universities(大学) ,hospitals and banks were allowed(允许) to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use.
Today it is easy to get on-line(上网) and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.
The Internet has now become one of the most important parts of people’s life.

The Internet has a history of ______ years.

A. less than 30

B. about 40

C. about 20
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