湖南省耒阳市冠湘中学九年级英语上册 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