填空题
| 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. |