关于电脑的单词和短语
电脑的英文：Computer
Computer 读法 英 [kəm'pjuːtə(r)] 美 [kəm'pjuːtər]
n. 电脑；计算机
短语
1、computer control 电脑控制
2、computer program 计算机程序
3、personal computer 个人电脑
4、computer graphics 电脑绘图
5、computer vision 计算机视觉
例句
1、We do something by computer.
我们用计算机做某事。
2、What do you usually do on your computer?
你通常在你的电脑上做什么？
Chapter 2
R1.List five nonproprietary internet applications and the application-layer protocols
that they use.
1. The Web: HTTP; file transfer: FTP; remote login: Telnet; Network News: NNTP; e-
mail: SMTP.
R5.in a p2p file-sharing application,do you agree with the statement,"there is no notion
of client and server sides of a communication session"?why or why not?
R9.What is meant by a handshaking protocol?
R15.why is it said that FTP sends control information "out-of-band"?
R22.the UDP server described in section 2.8 needed only socket,whereas the TCP
server described in section 2.7 two sockets,why?if the TCP server were to support n
simultaneous
Connections,each from a different client host,how many sockets would the TCP server
need?
P1.true or false
a.when a user requests a Web page that consists of some text and two images,for
The importance of computer
1.
With the developement of economy,more and more families schools and many others
places own computers.Every one likes using computer, so do l.
Childen use computer to study,look for useful material,reading writing,playgames and
so on.Adult use computer to writer reporters,do businse with others.
Computer also have a lot of functions. For example, we can communicate with others
through QQ,E-mail or MSN.We can find information to deal with our questions. wecan go
shopping through computer.
L think using computer is more important.
2.
We are depending on computers more and more nowadays as they are used
everywhere.Like in schools, offices, factories, shops. Peope use computers to
deal with all kinds of datas and information. Computers make work easier and
more effective. People also surf internet so we can learn a lot without going to
Computer Viruses
Computer virus, whose essential component is a set of instructions, is ine kind of
threat to the security and integrity of computer systems. Nowadays computer systems
worldwide are often infected by computer viruses. Some cause the loss of programs
and data, erase files or subtly alter data. Others even crash computers or make them
useless. In this way, each year they cause tens of billions of (US$) of losses.
It’s estimated there are about 4500kinds of computer viruses, being unleashed at
the rate of about 5 per day. How terrible! A case in point is “Love Bug” which
proclaims “I Love You”, the viruses would copy themselves an ddestroy valuable
computer pivtures and video files. Another case in point is the CIH, which is also very
destructive. Besides, there are also “Concept F”, “Explore Zip” and “Nimda”, to name
