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1、Unit3Theworldonline网络，一个科技发展的产物，也是信息时代的标志。它的出现改变了人们传统的思想方法，在我们的生活中给予了我们极大的帮助，同时也受到越来越多的青少年的青睐。ThePositiveEffectsoftheInternetTheInternethascomeaverylongwayinthepast50years.Newinnovationssuchasintegratedsoftwareandhardwarehavechangedthewaythatpeopleviewando
2、btaininformationtoday.MillionsofpeopleworldwideareusingtheInternettoshareinformation,makenewassociationsandcommunicate.Individualsandbusinesses,fromstudentsandjournalists,toconsultants,programmersandcorporategiantsareallharnessingthepoweroftheInternet.Form
3、anybusinesses,theInternetisbecominganintegral(必须的)partoftheiroperations.Perhaps,themostimportantfactsabouttheInternetarethatitcontainsawealthofinformation,whichcanbesentacrosstheworldalmostinstantly,andthatitcanunitepeopleinwildlydifferentlocationsasifthey
4、werenexttoeachother.Theinformationavailableisvastandvaried.TheInternetgivesconsumerstheabilitytoshopsmarter,tofindthebestproductsattherightprices.TheInternetbringspeopletogether.Peopleoflikemindsandinterestscanshareinformationwithoneanotherthroughelectroni
5、cmailandchatrooms.Mailinglistdiscussiongroupsandonlineconferencingallowustogathertogethertoworkonamultitudeofprojectsthatareinterestingorhelpfultous.Therearemanyschoolbasednetworksthatlinklearnerstodiscuss,shareandexaminespecificsubjectssuchasenvironmental
6、concerns,science,localandglobalissues,ortoenhancewrittencommunicationskillsinfirstorsecondlanguageproficiency(精通)activities.Onlineeducationintroducesunprecedentedoptionsforteaching,learning,andknowledgebuilding.Todayaccesstoamicrocomputer,modem,telephoneli
7、ne,andcommunicationprogram24offerslearnersandteachersthepossibilityofinteractionsthattranscendedtheboundariesoftimeandspace.Emailisenablingradicallynewformsofworldwidehumancollaboration.Thereforetherecouldbenoprejudices(成见)againstapersonwhoisusingtheIntern
8、et.SectionⅠ Welcometotheunit&Reading—WarmingUp1．statisticsn．(pl.)统计数字，统计数据，统计资料2．addressvt.探讨，解决，处理；向……说话；称呼(某人)3．falseadj.虚假的，伪造的；错误的；人造的4．withdrawvi.&vt.脱离(社会)，不与人交往；撤回；取(款)5．alarmvt.使担心，使害怕，使警觉n.警报(器)；惊慌；闹
