新视野大学英语读写教程第三版unit3讲义

BookOneUnitThree2I.Warming-upActivities1.PreviewandLead-in(p60)1).Whataretheadvantagesanddisadvantagesofeachwayofteachingandlearning?TraditionalclassroomAdvantages:moredirectcommunicationbetweenteachersandstudents;abetterlearningatmosphere.Disadvantages:littleinteractioneitheramongstudentsorbetweenstudentsandtheteacher;teacherstendingtodominatetheclass;writingonblackboardreducingefficiency.MultimediaclassroomAdvantages:morevividteachingmaterials;studentsbetterengagedinclassroomlearning.Disadvantages:toomanydistractionswithtoomanypicturesandvideosinmultimediaclassrooms.StudyingonlineinthedormAdvantages:beingabletochoosewhenandwhatyouwanttolearn;easyaccesstothewiderangeofonlineinformationDisadvantages:makingiteasierforstudentstocopyanswersfromtheInternet;lackofface-to-facecommunicationbetweentheteacherandstudent;thepossibilityforstudentstodevelopInternetaddiction.2).Whichwaydoyouprefer?Giveyourreasons.Ipreferthemultimediawayoflearning:itisvividwithteachingmaterialspresentedindifferentwaysComparedwithtraditionalclassroom,itismoreinteresting.Iprefertostudyonline:managemyowntimehavemyownpropertiesdothingsatmyownpace3).DoyouthinktheInternetisindispensableinteachingandlearningnowadays?Whyorwhynot?TheInternetisindispensable:getaccesstothelatestdevelopmentofteachingandlearning;enjoymanyinterestingonlinecoursescommunicatewithteachersafterclassTheInternetisnotindispensable:teachingandlearninghavebeencarriedoutlongbeforetheInternetcameintobeing;teachingandlearningcouldsurelycontinuewithouttheInternet.32.BackgroundInformation(p)Wi-FiWi-Fi(orWiFi)isalocalareawirelesstechnologythatallowsanelectronicdevicetoparticipateincomputernetworking.Itisdefinedasanywirelesslocalareanetwork(WLAN)productbasedontheInstituteofElectricalandElectronicsEngineers(IEEE)802.11standards.However,thetermWi-FiisusedingeneralEnglishasasynonymforWLANsincemostmodernWLANsarebasedonthesestandards.ManymoderndevicescanuseWi-Fi,e.g.personalcomputers,video-gameconsoles,smartphones,digitalcameras,tabletsanddigitalaudioplayers.ThesecanconnecttoanetworkresourcesuchastheInternetviaawirelessnetworkaccesspoint.Suchanaccesspoint(orhotspot)cancoveranareaassmallasasingleroomwithwallsthatblockradiowaves,oraslargeasmanysquarekilometersbyusingmultipleoverlappingaccesspoints.Wi-Fiallowscheaperdeploymentoflocalareanetworks(LANs).SpaceswherecablescannotberuncanalsohostwirelessLANs.Manufacturersarebuildingwirelessnetworkadaptersintomostlaptops.ThepriceofchipsetsforWi-Ficontinuestodrop,makingitaneconomicalnetworkingoptionincludedinevenmoredevices.Differentcompetitivebrandsofaccesspointsandclientnetworkinterfacescaninter-operateatabasiclevelofservice.ManytraditionaluniversitycampusesinthedevelopedworldprovideatleastpartialWi-Ficoverage.CarnegieMellonUniversitybuiltthefirstcampus-widewirelessInternetNetworkatitsPittsburghcampusin1993.ByFebruary1997theCMUWi-Fizonewasfullyoperational.ManyuniversitiescollaborateinprovidingWi-Fiaccesstostudentsandstaffthroughtheeduroam(educationroaming)internationalauthenticationinfrastructure.LaptopAlaptop(alsoknownasanotebook)isaportablepersonalcomputerdesignedformobileusesmallenoughtositononeslap.Alaptopismadeupofalargenumberofcomponentsthatallmustfunctionwellinorderforyourcomputerexperiencetobecomplete,whichincludeadisplay,akeyboard,apointingdevice(atouchpad,alsoknownasatrackpad,and/orapointingstick),speakers,aswellasabattery,intoasinglesmallandlightunit.Mostlaptopsaredesignedintheflipformfactortoprotectthescreenandthekeyboardwhentheyareclosed.Andmoderntabletlaptopshaveacomplexjointbetweenthekeyboardhousingandthedisplay,permittingthedisplaypaneltotwistandthenlayflatonthekeyboardhousing.Theyusuallyhaveatouchscreendisplayandsomeincludehandwritingrecognitionorgraphicsdrawingcapability.Laptopswereoriginallyconsideredtobeasmallnichemarketandwerethoughtsuitablemostlyforspecializedfieldapplicationssuchasthemilitary,theInternalRevenueService,accountantsandsalesrepresentatives.Buttoday,therearealreadymorelaptopsthandesktopsinbusinesses,andlaptopsarebecomingobligatoryforstudentuseandmorepopularforgeneraluse.SmartphoneAsmartphone(orsmartphone)isamobilephonewithanoperatingsystem.ThemajorityofsmartphonesrunonAppleiOSorGoogleAndroid,andmanyothersuse4WindowsPhoneorBlackBerryOS.Smartphonestypicallyincludethefeaturesofaphonewiththoseofotherpopularmobiledevices,suchaspersonaldigitalassistantsandGPSnavigationunits.Usuallytheyhaveatouchscreeninterfaceandcanrun3rd-partyapps.Withasmartphone,onecannotonlymakephonecalls,butalsosendandreceiveemails,andeditOfficedocuments.Butwhatmakessmartphonessopopularisthattheycanaccessthewebathigherspeeds,thankstothegrowthof3Gand4Gdatanetworks,aswellastheWi-Fisupport.Butasthetechnologyisconstantlychanging,whatconstitutesasmartphonetodaymaychangebynextweek,nextmonth,ornextyear.Staytuned!3.Pre-readingActivities(Compounddictation)1)ThisistheVOASpecialEnglishEducationReport.Butitalsodependsontheinterestand___________oftheteachers,andthegoalsandbudgetsoftheschools.Schoolsarealmostall_____________totheInternet.Butsomehavemoretechnology