通信英语-Lesson04.ppt

Unit 4Internet1Contentsn Revision n Pre-reading Activities n While-reading Activities uNew words and phrases uText organization n Text and translation n Post-reading Activities n Further Development of the Theme-related Specialized Knowledge n AssignmentsRevisionn Teacher uses the following exercise to help the students to revise the important expressions or phrases or sentences which were learnt in the study of last unit. n Teacher : When I say a phrase or an expression in Chinese, you respond by giving an English equivalent your learnt in the study of Unit3.返 回 Pre-reading Activitiesn 1. Ask the Ss the following two questions related to the theme of the text: n What is Internet？ n Possible answers: The Internet is a giant network of computers located all over the world that communicate with each other. n What are the usages of Internet? n Possible answers: The most commonly used network service is electronic mail (E-mail), or simply as mail. n 2. Teacher leads into the text by saying: From the explanation you gave about Internet, and also you’ve studied Internet before, based on your knowledge about them, I’m sure you can achieve a good understanding of the new text, Now, let’s have a careful study of the text. 返 回 While-reading Activities / New words and phrasesn collection n. 收集，收成 n address n. 地址 n complex n. 合成物，综合企业 n resource n. 资源 n dictate v. 命令，支配 n hypertext n. 超级文本 n interface n. 接口，界面返 回 While-reading Activities / Text organizationn 1. Ss read the text and point out the main idea of the text. n The main idea: The text mainly discusses the origin and development of Internet. n 2. Ss make an analysis of the organization of the text . n The text may be divided into three major sections. n Section 1 (Lines1-20): the origin of the Internet. n Section 2 (Lines21-73): the usages of Internet. n Section 3 (Lines74-85): the prospect of Internet.返 回 Text and translationn Internet (1)翻 译下 一 页返 回 Text and translationn The Internet is a giant network of computers located all over the world that communicate with each other.(2)翻 译下 一 页上 一 页返 回 Text and translationn The Internet is an international(3)collection of computer networks that all understand a standard system of addresses and commands, connected together through backbone systems. It was started in 1969, when the U.S. Department of Defense established a nationwide network to connect a handful of universities and contractors. The original idea was to increase computing capacity that could be shared by users in many locations and to find out[4] what it would take for computer networks to survive a nuclear war or other disaster by providing multiple path between users. 翻 译下 一 页上 一 页返 回 Text and translationn People on the ARPNET quickly discovered that they could exchange messages and conduct electronic “conferences“ with[5] distant colleagues for purposes that had nothing to do with the military industrial complex. If somebody else had something interesting(6) stored on his or her computer, it was a simple matter to obtain a copy.翻 译下 一 页上 一 页返 回 Text and translationn Over the years, additional networks joined which added access to more and more [7]computers. The first international connection, to Norway and England, were added in 1973.Today thousands of networks and millions of computers are connected to he Internet. It is growing so quickly that [8]nobody can say exactly how many users “On the Net“. 翻 译下 一 页上 一 页返 回 Text and translationn The Internet is the largest repository of information (9) which can provide very very large network resources. The network resources can be divided into network facilities resources and network information resources. 翻 译下 一 页上 一 页返 回 Text and translationnThe network facilities resources provide us the ability of remote computation and communication. The network information resources provide us all kinds of information services, such as science, education, business, history, haw, art, and entertainment,(10) etc.翻 译下 一 页上 一 页返 回 Text and translationn The goal of your use of the Internet is exchanging messages or obtaining information. What you need to know is that you can exchange message with other computers on the Internet and use your computer as a remote terminal on distant computers. (11) But the internal details of the link are less important, as long as it works. If you connect computers together on a network, each computer must have a unique address, which could be either a word or a number. For example, the address of Sam's computer could be Sam, or a number.翻 译下 一 页上 一 页返 回 Text and translationn The Internet is a huge interconnected system, but it uses just a handful of method to move data around. Until the recent explosion of public interest in the Internet, the vast majority of the computers on the Net use the U。