九年级英语上册 Unit 4 Topic 1 When was it invented Section D课件 （新版）仁爱版.ppt

,Unit4AmazingScience,Topic2Whenwasitinvented?,SectionD,Haveyouevergotlostsomewhere?Whatmethoddidyouusetofindyourdirection?,Wherearewe?,Readanddiscussthefollowingquestions.1.Whatwouldyoudoifyouloseyourwayinaforest?2.Howdidtheearlyexplorersknowwheretheywere?3.WhatisGPS?Isitusefultous?4.WhatdoyouthinkGPSwillbeusedforinthefuture?,WhatisGPS?GPS即全球定位系统(GlobalPositioningSystem)，简单地说，这是一个由覆盖全球的24颗卫星组成的卫星系统。这个系统可以保证在任意时刻，地球上任意一点都可以同时观测到4颗卫星，该观测点可以通过接收到的信号计算出经纬度和高度，以便实现导航、定位、授时等功能。这项技术可以用来引导飞机、船舶、车辆以及个人，安全、准确地沿着选定的路线，准时到达目的地。,疑难讲解1.indirection按/朝方向e.g.Amotorbikehitatruckintheoppositedirection.2.workwell奏效；起作用e.g.Themedicineworkedwell.3.aslongas只要；长达e.g.Youcangoouttoplayaslongasyoufinishyourhomework.e.g.IhavetaughtEnglishaslongasnineyears.,Readandanswerthequestion.Athiefstoleabeautifulcellphonefromayounggirl.Heranawayveryquicklyandthenhidinasecretplace.Tohissurprise,whenhewasusingthecellphone,hewascaughtbythepolice.Doyouknowwhy,BluetoothBluetoothisashortdistancewirelesscommunicationtechnology.Itprovidescoverage(覆盖）ofupto100meters.Itsalowpowertechnologythatcanbeusedtoconnectcellphonesorcomputerwithotherdevices.,Abluetoothheadset,长长见识,根据首字母提示，完成短文。ThankstoGPS,wecanexactlyknoww_wearenow.GPSislikeaman-made“star”.Itcanbeu_inanyplaceandanyweatherconditiontofindoutourp_.Inthepast,theearlyexplorershadtousestarsinthes_totellthemwheretheywere,however,thismethoddidntworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere_ourplanets.,here,osition,sed,ky,xplore,当堂检测,Whathaveyoulearntaboutinthistopic?Canyousaysomethingaboutoneofthem?1.Rocket2.Cloning3.Robots4.GPS5.Othergreatinventions,1.它是由什么制成的？Whatsitmadeof/from?2.我希望有一天我也能飞到太空。IwishIcouldgointospacesomeday.3.我希望你的梦想能实现。Ihopeyourdreamwillcometrue.4.众所周知，大多数生物体内都有DNA，包括人。Asweknow,thereisDNAinmostlivingthings,includinghumanbeings.5.没有人确切地知道，但是大多数人认为机器人会成为我们生活的一部分。Nooneknowsforcertain,butmostpeoplethinkrobotswillbepartofourlives.6.总而言之，这个机器人对我们很有帮助。Inshort,thisrobotisveryusefultous.,看谁能根据中文意思快速翻译六个句子。,口语比拼,2a,Grammarfocus,Passivevoice(),TheradiowasinventedbyGuglielmoMarconiin1895.,Whenwasitdeveloped?Wherewasitdeveloped?Wherewerelaptopsinvented?,Around1998.ItwasdevelopedinKorea.TheywereinventedinJapan.,2b,Usefulexpressions,Whatsitmadeof/from?Itsmadeof/from.IwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.ThereisDNAinmostlivingthings,includinghumanbeings.Nooneknowsforcertain,butmostpeoplethinkthatrobotswillbepartofourlives.,Passivevoice被动语态was/were+done考点探究()1.Abigsupermarket_inourcitylastyear.A.isbuiltB.werebuiltC.wasbuilt()2.Couldyoutellmewhotheradio_by?A.inventsB.inventedC.wasinvented()3.Manytreesandflowers_inourschoollastyear.Theymadeourschoolmorebeautiful.A.haveplantedB.wereplantedC.planted()4.Thechildren_swimlastmonthandtheycanswimverywellnow.A.aretaughtB.weretaughtC.weretaughtto()5.Itissaidthatpotatochips_bymistakeaboutonehundredyearsago.A.wereinventedB.inventedC.areinvented,C,B,C,A,C,Grammarfocus,被动语态综合练习一、用所给词的适当形式填空。1.Youarelate,allthetickets_(sell)outanhourago.2.Thistypeofcellphone_(make)inShenzhen.3.Thestory_(happen)inamagicland.4.Herhomework_(finish)yet,sosheisstillworkingonitnow.5.When_thesportsmeeting_(hold)?6.Look,anewroad_(build)inthatarea.7.Thedirtyclothesmust_(wash)atonce.8.Theroses_(smell)sweet.9.Itiswell_(know)thattheGreatWallisthesymbolofChina.,weresold,weremade,happened,hasntbeenfinished,willbeheld,isbeingbuilt,bewashed,smell,known,be的某一时态形式+v.的过去分词,二，将下列句子改为被动语态。1.PeopleuseradiostolearnEnglishinthepast._2.Jackwillshowmethephoto._3.TheyhaveraisedmuchmoneyfortheProjectHope._4.IoftenhearMarysingEnglishsongsathome._5.Wemustntthrowlitterabout._6.Apolicemanisrunningafterathiefinthestreet._7.PeoplecanvisitplanetslikeMars._,RadioswereusedtolearnEnglishinthepast.,Thephotowillbeshowntome./IwillbeshownthephotobyJack.,MuchmoneyhasbeenraisedfortheProjectHope.,MaryisoftenheardtosingEnglishsongsathome.,Littermustntbethrownabout.,Athiefisbeingranafterinthestreet.,PlanetslikeMarscanbevisited.,三，单项选择。()1.Hurryup,you_onthephone.A.WantedB.waswantedC.arewanted()2.Somestories_thechildrenbytheteachereveryday.A.istoldforB.aretoldforC.aretoldto()3._thathehasstudiedabroadforfiveyears.A.ItissaidB.ItsaysC.Thatissaid()4.Thewindow_fiveminutesago.A.iscleanedB.wascleanedC.canbecleaned()5.Thechildren_bytheteachersatschool.A.takecareofB.aretakencareC.aretakencareof,C,C,A,B,C,()6.Ihavenoideawhat_whileIwasasleep.A.happenedB.washappenedC.happens()7.Insomecountries,tea_beforemeals.A.isservingB.isservedC.served()8.Thiskindofbooks_well.A.doesntsellB.isntsellingC.arentsold.()9.I_tenminutestodecidewhichsentencewasrightbytheteacher.A.gaveB.wasgivenC.wasgiving()10.Teachers_ineverypartoftheworld.A.areneedingB.areneededC.willneed,A,B,A,B,B,Practicemakesperfect.,一、词汇：A,根据所给英汉提示写出单词。1.Whatarethese_(牙刷）madeof?2.AteamfromUKwerethefirstto_(克隆）ananimalsuccessfully.3.ThelightbulbisoneofEdisons_(发明).4.Wouldrobotsliketobehumanbeings_(佣人)iftheycanthinkforthemselves?5.Wewillgo_(只要）theweatherisgood.,话题检测,toothbrushes,clone,inventions,servants,aslongas,B，根据首字母提示补全单词。6.ClassThreearedoinge_inthelab.7.O_scientistsfindlifeonMars,wewillhaveanewlivinghomeland.8.Hew_usnottogooutafteritwasdark,fortheroadcoveredwithsnowwasdangerous.9.Weshouldmakeac_toprotectingthewildanimals.10.Afterschool,studentsshouldhelptheirparentsdosomeh_.,xperiments,nce,arned,ontribution,ousework,二、根据汉语提示完成句子。1.Itisbadforyourhealthtoeat_(太多).2.Ourcountryhas_ChangeI_(发射)spacesuccessfully.3._(据说）thatJesusChristwasborninabarn.4._（到目前为止)，wehavefinishedalotofjobs.5.Jimspen_(相似)mine.6.Weshouldhavethegoodhabitof_(独立思考).7._(总而言之),heisagreatastronaut.8.Ibelieveourhopewill_(变成现实).,toomuch,sentinto,Itissaid,Sofar,issimilarto,thinkingforourselves,Inshort,cometrue,三、情景对话，选择正确的应答语。A:Hi,Juanjuan,Whatareyoudoing?B:IamwatchingTV.A:_B:Sorry,Idontknow._A:Thatsbecauseofman-madesatellites.B:_A:Theycansendandreceivemessages.Withtheirhelp,ChinacansenditsTVandradioprogramstotheothersideoftheworld._w