实用英语U6TextB市公开课一等奖百校联赛特等奖课件.pptx

Pre-Reading TaskPre-Reading Task While-Reading TaskWhile-Reading Task After-Reading Task After-Reading Task Unit 6:Text BUnit 6:Text B第1页Pre-reading TaskPre-reading TaskText-related InformationText-related InformationPre-reading ActivityPre-reading Activity第2页The Rise of The InternetThe Rise of The InternetInstant MessagingInstant MessagingMessage BoardMessage BoardText-related InformationText-related Information第3页Text-related InformationText-related InformationThe rise of the Internet:The rise of the Internet:Before Before the the widespread widespread internetworking internetworking that that led led to to the the Internet,Internet,most most communication communication networks networks were were limited limited by by their their nature nature to to only only allow allow communications communications between between the the stations stations on on the the local local network network and and the the prevalent prevalent computer computer networking networking method method was was based based on on the the central central mainframe mainframe computer computer model.model.Several Several research research programs programs began began to to explore explore and and articulate articulate principles principles of of networking networking between between physically physically separate separate networks,networks,leading leading to to the the development development of of the the packet packet switching switching model model of of digital digital working.These These research research efforts efforts included included those those of of the the laboratories laboratories of of Donald Donald Davies Davies(NPL),(NPL),Paul Paul Baran Baran(RAND(RAND Corporation),Corporation),and and Leonard Leonard Kleinrock Kleinrock at at MIT MIT and and at at UCLA.UCLA.The The research research led led to to the the development development of of several several packet-switched packet-switched networking networking solutions solutions in in the the late late 1960s 1960s and and 1970s,1970s,including including ARPANET ARPANET and the X.25 protocols.and the X.25 protocols.第4页Text-related InformationText-related InformationAdditionally,Additionally,public public access access and and hobbyist hobbyist networking networking systems systems grew grew in in popularity,popularity,including including unix-to-unit unix-to-unit copy copy(UUCP)(UUCP)and and FidoNet.FidoNet.They They were were however however still still disjointed disjointed separate separate networks,networks,served served only only by by limited limited gateways gateways between between works.This This led led to to the the application application of of packet packet switching switching to to develop develop a a protocol protocol for for internetworking,internetworking,where where multiple multiple different different networks networks could could be be joined joined together together into into a a super-super-framework framework of of works.By By defining defining a a simple simple common common network network system,system,the the Internet Internet Protocol Protocol Suite,Suite,the the concept concept of of the the network network could could be be separated separated from from its its physical physical implementation.implementation.This This spread spread of of internetworking internetworking began began to to form form into into the the idea idea of of a a global global network network that that would would be be called called the the Internet,Internet,based based on on standardized standardized protocols protocols officially officially implemented in 1982.implemented in 1982.第5页Text-related InformationText-related InformationAdoption Adoption and and interconnection interconnection occurred occurred quickly quickly across across the the advanced advanced telecommunication telecommunication networks networks of of the the western western world,world,and and then then began began to to penetrate penetrate into into the the rest rest of of the the world world as as it it became became the the de-facto de-facto international international standard standard for for the the global global work.However,However,the the disparity disparity of of growth growth between between advanced advanced nations nations and and the the third-world third-world countries countries led led to to a a digital digital divide divide that that is still a concern today.is still a concern today.Following Following commercialization commercialization and and introduction introduction of of privately privately run run Internet Internet service service providers providers in in the the 1980s,1980s,and and the the Internets Internets expansion expansion for for popular popular use use in in the the 1990s,1990s,the the Internet Internet has has had had a a drastic drastic impact impact on on culture culture and and merce.This This includes includes the the rise rise of of near near instant instant communication communication by by electronic electronic mail mail(e-mail),(e-mail),text text based based discussion discussion forums,forums,and and the the World World Wide Wide Web.Web.Investor Investor speculation speculation in in new new markets markets provided provided by by these these innovations innovations would would also also lead lead to to the the inflation inflation and and subsequent subsequent collapse collapse of of the the Dot-com Dot-com bubble.bubble.But But despite despite this,this,the the Internet Internet continues continues to to grow.grow.第6页Text-related InformationText-related InformationInstant messaging:Instant messaging:Instant messaging (IM)is a collection Instant messaging (IM)is a collection of technologies that create the possibility of of technologies that create the possibility of real-time text-based communication between real-time text-based communication between two or more participants over the Internet or two or more participants over the Internet or some some form form of of internal internal network network/intranet.intranet.It It is is important important to to understand understand that that what what separates separates chat chat and and instant instant messaging messaging from from technologies technologies such such as as e-mail e-mail is is the the perceived perceived synchronicity synchronicity of of the the communication communication by by the the user user chat chat happens happens in in real-time.real-time.Some Some systems systems allow allow the the sending sending of of messages messages to to people people not not currently currently logged logged on on(offline(offline messages),messages),thus thus removing removing much much of of the the difference difference between between Instant Messaging and e-mail.Instant Messaging and e-mail.第7页Text-related InformationText-related Information IM IM allows allows effective effective and and efficient efficient communication,communication,featuring featuring immediate immediate receipt receipt of of acknowledgment acknowledgment or or reply.reply.In In certain certain cases cases Instant Instant Messaging Messaging involves involves additional additional features,features,which which make make it it even even more more popular,popular,i.e.i.e.to to see see the the other other party,party,e.g.e.g.by by using using web-cams,web-cams,or or to to talk talk directly for free over the Internet.directly for free over the Internet.第8页Text-related InformationText-related Information It It is is possible possible to to save save a a conversation conversation for for later later reference.reference.Instant Instant messages messages are are typically typically logged logged in in a a local local message message history history which which closes closes the the gap gap to to the the persistent persistent nature nature of of e-mails e-mails and and facilitates facilitates quick quick exchange exchange of of information information like like URLs URLs or or document document snippets snippets(which(which can can be be unwieldy unwieldy when communicated via telephone).when communicated via telephone).第9页Text-related InformationText-related InformationMessage board:Message board:A A message message board board or or Internet Internet forum,forum,is is an an online online discussion discussion site.site.It It originated originated as as the the modern modern equivalent equivalent of of a a traditional traditional bulletin bulletin board,board,and and a a technological technological evolution evolution of of the the dialup dialup bulletin bulletin board board system.system.From From a a technological technological standpoint,standpoint,forums forums or or boards boards are are web web applications applications managing user-generated content.managing user-generated content.People People participating participating in in an an Internet Internet forum forum may may cultivate cultivate social social bonds bonds and and interest interest groups groups for for a a topic topic may may form form from from the discussions.the discussions.第10页Text-related InformationText-related Information第11页Text-related InformationText-related Information第12页Pre-reading TaskPre-reading TaskExercise 1 Exercise 1 The passage you are going to read is entitled“Life The passage you are going to read is entitled“Life Without the Internet?”Think about the questions Without the Internet?”Think about the questions before reading the passage.before reading the passage.1.What changes has the Internet brought to our life?2.What would life be like now without the Internet?Now read the passage to learn the authors answer Now read the passage to learn the authors answer to the questions.to the questions.第13页Text BText BDetailed Study of the TextDetailed Study of the TextWhile-Reading TaskWhile-Reading Task第14页 Text B Text B Life Without the Internet?Life Without the Internet?1 1 The The rise rise of of the the Internet Internet has has been been probably probably one one of of the the most most revolutionary revolutionary things things that that happened happened to to our our lives lives in in recent recent history.history.While While it it had had been been aroundaround in in one one form form or or another another for for around around two two decades,decades,it it has has only only been been in in the the last last ten ten or or so so years years that that it it has has become become an an increasingly increasingly omnipresentomnipresent part of many of our lives.part of many of our lives.This This is is what what one one should should keep keep in in mind mind when when considering considering what what life life would would be be like like without without the the online online presence that many of us rely on in some form or another.presence that many of us rely on in some form or another.While-Reading TaskWhile-Reading Task第15页2 2 In In terms terms ofof work work and and research,research,the the Internet Internet has has made made looking looking for for things things far far more more convenient convenient than than they they were were in in the the past.past.What What used used to to take take multiple multiple trips trips to to the the library library and and hours hours of of trying trying to to track track books books and and articles articles downdown can can now now be be done done to to a a large large degree degree by by sitting sitting at at a a computer computer and and looking looking through search engines.If you can find an article online,through search engines.If you can find an article online,the the time time saved saved can can be be immeasurable.immeasurable.In In addition,addition,without without the the Internet,Internet,the the ability ability to to find find sources sources for for a a term term paper paper or or for for some some business business proposal proposal would would often often be be limited limited to to what what you you can can find find in in your your immediate immediate surroundings.surroundings.Thus,Thus,if if you you lived lived in in a a largely largely rural rural area area that that didnt didnt have have a a lot lot of of bookstores bookstores or or libraries,libraries,then then there there was was a a chance chance that that what what you you could could find find and and examine examine would would be be a a lot lot less less diversediverse than than people in a more diverse cultural and literary environment.people in a more diverse cultural and literary environment.While-Reading TaskWhile-Reading Task第16页3 3 In In terms terms of of retail,retail,the the Internet Internet has has made made shopping shopping much much easier easier for for many many people.people.Being Being able able to to purchase purchase something something online online potentially potentially means means more more options options are are available available to to find find something something than than going going to to the the mall mall or or some some store store in in your your town town could could provide.provide.Also,Also,the the ability ability to to ship ship online online anywhere anywhere makes makes the the process process of of getting getting gifts gifts easier easier and and possibly possibly saves saves time time that that was was previously previously spent spent parking parking your your car car or or wrapping wrapping a a gift.gift.Many Many people people around around the the world world shop shop online online for for various various reasons reasons ranging ranging from from a a dislike dislike of of crowds crowds at at the the mall mall to to just just being being too busy to shop any other way.too busy to shop any other way.While-Reading TaskWhile-Reading Task第17页4 4 When When ponderingpondering what what life life would would be be like like without without the the Internet,Internet,the the most most marked marked change change would would have have to to be be in in how how we we municate.Unfortunately,Unfortunately,it it is is here here that that things things may may have have changed changed for for the the worse.worse.It It is is easy easy to to discuss discuss the the ease ease of of using using e-mail e-mail and and various various forms forms of of instant instant messaging messaging when when trying trying to to contact contact people.people.However,However,in in its its place place it it can can be be stated stated that that its its possible possible weve weve lost lost touch touch with with how how to to communicate communicate in in person.person.The The anonymityanonymity of of the the online online world world means means debates debates can can potentiallypotentially get get nastier nastier without without ever ever having having to to consider consider the the other other persons persons argument.argument.This This is is present present in in various various message message boards boards where where being being attacked attacked for for your your beliefs beliefs can can be be done done without without fear fear of of reprisalreprisal since since you dont always have to give your name.you dont always have to