考博考试

【单选题】Internet is a vast network ofcomputers that connects many of the world’s businesses, institutions, and individuals．The internt, which means interconnected network of networks, links tens of thousands of smaller computer networks．These networks transmit huge amounts of infermation in the form of words, images, and sounds．
The Internet was information on virtually every topiC、Network users can search through sources ranging from vast databases to small electronic"bulletin boards"．where users form discussion groups around common interests．Much of the Internet’s traffic consists of messages sent from one computer user to another．These messages are called electronic mail or e-mail． Internet users have electronic addresses that allow them to send and receive e-mail．Other uses of the network include obtaining news, joining electronic debates, and playing electronic games．One feature of the Internet, known as the World Wide Web, provides graphics, audio, and video to enhance the information in its documents．These documents cover a vast number of topics．
People usually access the internt with a device called a modem．Modems connect computers to the network through telephone lines．Much of the Internet operates through worldwide telephone networks of fiber optic cables．These cables contain hair thin strands of glass that carry data as pulses of light．They can transmit thousands of times more data than local phone lines, most of which consist of copper wires．
The history of the Internet began in the 1960s．At that time．theAdvanced Research ProjectsAgencyARPA、of the United StatesDepartment ofDefense developed a network of computers calledARPAnet．Originally,ARPAnet connected only military and govemment computer systems． Its purpose was to make these systems secure in the event of a disaster or war．Soon after the creation ofARPAnet, universities and other institutions developed their own computer neavorks． These networks eventually were merged withARPAnet to form the Internet．By the 1990s, anyone with a computer,modem, and Internet software could link up to the Internet．
In the future, the Internet will probably grow more sophisticated as computer technology becomes more powerful．Many expels believe the Internet may become part of a larger network called the information superhighway．This network, still under development, would link computers with telephone companies, cable television stations, and other communication systems．People could bank, shop, watch TV,and perform many other activities through the network．
The internt enables people to do all the following thingsEXCEPT______．
A．sending email
B、obtaining news
C．exchanging modernD．internet related chat(IRC、
网考网参考答案：C
网考网解析：
[解析] 本题可参照文章的第2段。从中可知，互联网的应用包括电子公告板、大型数据库、电子邮件、游戏、获取新闻、参与网上辩论等有关功能，只有交换调制解调器没有被提到，因此C项为正确答案。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>