高二英语第二册unit-23-telephones课件

高二英语第二册第二十三单元欢迎老师们和同学们光临指导！请多提宝贵意见！2020年10月2日1

Unit23Telephones2020年10月2日2Someearliesttelephones2020年10月2日32020年10月2日4Fastreading:Howwasonetelephoneconnectedwithanotherinthepast?Howisonetelephoneconnectedwithanothertoday?Bythickheavywires.Bysatellite;byverythinglasspipes.2020年10月2日5Choosethebestanswers.1.Whenyouspeakintothetelephone,thewavesofyourvoiceareturnedinto____.A.electricalsoundsB.electricalsignalsC.lightsignals2.Thehandleofanoldtelephonewasusedfor______.A.producingenoughelectricitytomakeacallB.connectingwithanothertelephoneC.gettingbetterelectricalsignals3.Thejobofanoperator(接线员）is_____.A.towindthehandleforcustomersandchargethephonecallsB.toconnectthetwonumbers,totimeandchargethephonecallsC.tomendtelephonesandtelephonewires2020年10月2日64.____canbeusedtosendtelephonesignalsoverlongdistancesbysatellite.A.SoundwavesB.WaterwavesC.radiowaves5._____makesitpossibleforpeopleatdifferentplacestohearoneanotherspeak.A.RedirectionB.ConferencemeetingC.Callwaiting6.Theserviceofredirectionmakessurethat______.A.youcanreceivecallswhereveryouareB.allthetelephonecallscanbereceivedbyyoursecretaryC.telephonecallscanberecordedifyouarenotatyouroffice

2020年10月2日7theearliesttelephonesThequalityoftheearliesttelephonesAtthebeginningitwasdifficulttohearpeopleoveralongdistanceThewiresoftheearliesttelephonesthick,heavyandexpensiveHowtomakeatelephonecallinthosedays?havetowindahandletoproduceelectricity.calltheoperatorandtellherwhichnumberyouwanted.Theoperatorconnectedthetwonumbersandmadeanoteofthelengthofthecallandthecharge.Thenumberoftheearliesttelephonesin1877,2600thewaytosendsignalsMetalwireswereusedtosendelectricalsignalsinthepast.Theproblemswithelectricalsignalsisthattheygetweakerandweakerastheytravelalongmetalwires.2020年10月2日8somemoderntelephones2020年10月2日9EricssonConceptPhonesThissmallcomputer-likeTelephoneisstillamystery.2020年10月2日10telephonesofthepresentdayImprovementsthathavebeenmade.Insteadofusingmetalwirestosendelectricalsignals,verythinglasspipes,about1mmwide,areusedtosendsignals.Becauselightsignalscantravel150kmwithoutgettingweaker,andtheirsignalsisclearer,too.

cordlessphonesIthasnowires.itcanbeusefulinofficeorinthefactory.Youcancarryitwithyouandlookuptheinformationyourcallerwants.Thatis,youcanwalktoadistantpartoftheofficeorfactorytochecktheinformationwithoutputtingdownthephone.Thenumberoftelephonesby1990.300million2020年10月2日11thewaysinwhichnewmodelsoftelephonecanbeused1.conferencecalling2.dialling

3.redirection4.callwaiting2020年10月2日12Howatelephoneworks?Whenyouspeakintothetelephone,thesoundwavesofyourvoiceareturnedintoelectricalsignals.Thesignalissentdownapairorwirestoreceivingtelephone.Theretheelectricalsignalischangedbackintosound.2020年10月2日13MobilePhonesInOurLife2020年10月2日14advantagesofmobilephone:Ithasnowiresandcanbecarriedabout.

Itissmart.Withthedevelopmentofscienceandtechnologyitwillhasmoreandmorefunctions.2020年10月2日15Today,MobilePhoneisnottheverythingthatyoucancalleachother.It’smorethanatelephone,acommunicatingtool.Itdevelopstobemultifunction(多功能的）anduseful.WithaMobilePhoneyoucantakephotos,listentomusic,surfontheInternet,havemeetings,watchTV,sendE-mailsandE-cards.2020年10月2日16WatchPhone–akindofmobilephonewhichlookslikeawatch.2020年10月2日17I-mode（时尚）telephoneTheycandownloadalovely,PopularcartoonanimalKittyCatastheScreenSaver(屏保).TheI-modeusescanconnectwiththeInternetfrequently,SendandreceiveE-mails,andseekthehotelsandbars.2020年10月2日18Photo-takingandsong-listeningPhoneYoucantakephotosandmakethemintocharacterful（个性化的）E-cardsandsendout.Onthetopofitisarecordinglens(录象镜头).ThebigclearscreencanbeconvenienttobrowsethenetpagewhenyousurfontheInternet.Inaddition,youcanlistentomusicasyouareenjoyingtherecordedvideo.2020年10月2日19MobilephoneswhichcanbeusedforsurfingontheIntent.2020年10月2日20Meeting—Plate–aKindofphoneusedforconferencecalling,whichhasAbigscreen.Thecoloredscreentakesupthree-fourthsofthebody.2020年10月2日21NTTDoCoMo64MB—MemoryDownloadMobilePhoneYoucandownloadsongs.ItisequippedInsidewitha64MBRAM内存.Themostattractivethingisthatithasa256-colorscreen.2020年10月2日22Mobilephoneswhichcanbeusedtolistentomusic.2020年10月2日23PDA（掌上电脑）mobilephones2020年10月2日24LessonNinety

SomeimportantandDifficultLanguagePoints1.turninto(使)变成,把…翻译成Eg.Icewasturnedintowaterbytheheat.Shehasturnedherolddressintoaskirt.CanyouturnthetextintogoodEnglish?2.senddown把…向下发送,使(温度,价格)下降Eg.Thesignalissentdownapairofwirestothereceivingtelephone.这个电信号就是沿着两根导线向下发送到受话机上.2020年10月2日253.changeinto=turnintoEg.Snowhaschangedintowater.4.makeacall=call,giveacall打电话Eg.MayIuseyourphone?

I’dliketomakeacalltoMr.Brown.*makeacall(anothermeaningistovisitsb.)5.makeanote(notes)of记录,记录下,写下

Eg.Whenreading,Ialwaysmakecarefulnotes.2020年10月2日26***5.makeanote(notes)of

记录,记录下,写下

Eg.Whenreading,Ialwaysmakecarefulnotes.

*make/takeanote(notes)of“注意,理会6.insteadof代替(contrast:insteadadv.)

Eg.Iwillgoinsteadofyou.

Also:Iwillgoinstead.

2020年10月2日27MultipleChoices:1.Hi,Jim,youare______onthephone.A.speakingB.beingwantedC.wantedD.spoken2.DoIhavetopaytogetin?No,it’s________.A.freeofchangeB.freeofchargeC.freetochangeD.freetocharge3.-Hello.CanIspeaktoPeter,please?-______.I’llgoandgethim.A.There’snoPeterhere.B.Speaking.C.Holdon,please.D.Wrongnumber.4.—Howmuchdidthecoatcost?Justfivedollars.It’sareal_____.A.bargainB.valueC.worthD.priceBCCA2020年10月2日285.Thoughthemobilephoneisquitesmall,its____isveryclear.

A.signalB.markC.signD.marks6.Tomlikesto___thiskindofcapon.A.wearB.haveC.putD.dress7.Iboughtthetelephonehereyesterday,butnowit______work.A.can’tB.didn’tC.wouldn’tD.doesn’t8.She_____hisnumberinthephonebooktomakesurethatshehadgotitright.A.lookedforB.pickedoutC.pickedupD.lookedup9._____hewillcometohelpusisnotclear.A.ThatB.WhetherC.EitherD.What10.—Hello.IsthatMike?--___.Thisis322567.A.Yes,thisisB.No,I’mnotC.No,itisn’tD.Yes2020年10月2日29Moreandmorepeopleareusingthekind1.________ofnew-developedphonewhichiscalledmobile2.________phone.Ithasnotwiresandcanb