Unit 3Net ChangesLife (2)n nPart I Warming upPart I Warming upn nSection A: History of CommunicationsSection A: History of Communicationsn nPre-listening questions:Pre-listening questions:n n1 1. What ways do you use to communicate with . What ways do you use to communicate with your families or friends? your families or friends? n n2. What ways have humans used to send 2. What ways have humans used to send messages? messages? n nDo you know when they were invented or first Do you know when they were invented or first used?used?n alphabet:alphabet:n nThe English alphabet has 26 letters.The English alphabet has 26 letters.n n英语共有二十六个字母。英语共有二十六个字母。n n字母系统字母系统, ,字母表字母表n ntelegraph:telegraph: a method of sending and receiving messages by a method of sending and receiving messages by electrical or radio signalselectrical or radio signalsn ndevise:devise: n n设备设备, ,仪器仪器, ,装置装置n nThe television receiver is an electronic device.The television receiver is an electronic device.n n电视接收器是一种电子装置。电视接收器是一种电子装置。n ntransmittransmit: : to broadcast something, or to send out or to broadcast something, or to send out or carry signals using radio, television, etc carry signals using radio, television, etc n n发射发射; ;播送播送n nThe message was transmitted by radio.The message was transmitted by radio.n n这情报是用无线电发送的。这情报是用无线电发送的。n na wire cablea wire cable 有线电缆有线电缆n nPennsylvania: Pennsylvania: A state of the eastern United States. played a crucial role in the American Revolution and in the formation of the new republic. Harrisburg is the capital and Philadelphia the largest city. Population: 12,400,000.n n ncontinentcontinent: : n none of the seven large land masses on the Earths surface, one of the seven large land masses on the Earths surface, surrounded by sea, consisting of various countries:surrounded by sea, consisting of various countries: e.g. e.g. the North American continentthe North American continent Asia and Africa are the two biggest continentsAsia and Africa are the two biggest continents. .n ncommunications satellitecommunications satellite: : n n通讯卫星通讯卫星n norbit:orbit: n n轨道轨道n nhoax hoax n n恶作剧恶作剧n ncoordinate coordinate n n使协调使协调 Key to Ex.n1-cn2-en3-an4-dn5-bn6-gn7-hn8-f Part 2 Net changes dorm lifendormitoryn寝室na top priorityn优先nhigh-speed Internet accessn快速接入因特网nmerger: n nwhen two or more companies join together:when two or more companies join together:合并合并n nThe merger of these two companies would create the The merger of these two companies would create the worlds biggest accounting firm.worlds biggest accounting firm.npipelinen管道nenvision: n nto imagine or expect as a likely or desirable to imagine or expect as a likely or desirable possibility in the future: possibility in the future: 想象n nIts hard to envision how it could have happened Its hard to envision how it could have happened nn nmeagermeager: very small or not enough:na meager salaryn nbudgetbudget:n 1. V.to plan how much money you will spend on something:nThe school budgeted one million dollars for a new library.n学校编列了一百万美元建新图书馆的预算。n2. N. a plan to show how much money a person or organization will earn and how much they will need or be able to spend:预算nIt is essential to balance ones budget.n量入为出是很重要的。nfraction: na small part of something小部分 n nHe has done only a fraction of his homework.He has done only a fraction of his homework.n n他只做了家庭作业的一小部分。他只做了家庭作业的一小部分。. .nthe bulk of: nmost of:大部分nIn fact, the bulk of the book is taken up with criticizing other works.n toll: n nthe money a long-distance telephone call costs:the money a long-distance telephone call costs:na toll free calln n免费电话免费电话n nmow downmow down:n nto kill people, usually in large numbers, by to kill people, usually in large numbers, by shooting them or driving a vehicle into them:shooting them or driving a vehicle into them:n nThree shoppers were Three shoppers were mown downmown down this afternoon this afternoon when a drunken driver lost control of his car.when a drunken driver lost control of his car.n nsimultaneouslysimultaneously: : at the same time at the same timen nantiquated:antiquated:n nold-fashionedold-fashionedn nCompared with modern satellite dishes, ordinary Compared with modern satellite dishes, ordinary TV aerials look positively antiquated.TV aerials look positively antiquated.n nHer uncle is antiquated in ideas.Her uncle is antiquated in ideas.n n她叔父的思想陈旧保守。她叔父的思想陈旧保守。n nantiquated ideas/attitudes/valuesantiquated ideas/attitudes/valuesn nantiquated laws/machinery/technologyantiquated laws/machinery/technologyn n过时的过时的Ex. An1) b.getting assignments and research papersn c. attending professors “virtual office hours”n d. course lecturesn2)b.online gamesn3)b.toll-free phone callsn4)e-commerceB.Questionsn1.What kind of age does the proposed merger of America Online and Time Warner anticipate?n2.For todays students, is it a top priority to have high-speed Internet access when they are choosing a college?n3.Is it