,Unit4AmazingScience,Topic2Whenwasitinvented?,SectionD,Haveyouevergotlostsomewhere?Whatmethoddidyouusetofindyourdirection?,Wherearewe?,Readanddiscussthefollowingquestions.1.Whatwouldyoudoifyouloseyourwayinaforest?2.Howdidtheearlyexplorersknowwheretheywere?3.WhatisGPS?Isitusefultous?4.WhatdoyouthinkGPSwillbeusedforinthefuture?,WhatisGPS?GPS即全球定位系統(tǒng)(GlobalPositioningSystem)，簡單地說，這是一個由覆蓋全球的24顆衛(wèi)星組成的衛(wèi)星系統(tǒng)。這個系統(tǒng)可以保證在任意時刻，地球上任意一點都可以同時觀測到4顆衛(wèi)星，該觀測點可以通過接收到的信號計算出經(jīng)緯度和高度，以便實現(xiàn)導航、定位、授時等功能。這項技術(shù)可以用來引導飛機、船舶、車輛以及個人，安全、準確地沿著選定的路線，準時到達目的地。,疑難講解1.indirection按/朝方向e.g.Amotorbikehitatruckintheoppositedirection.2.workwell奏效；起作用e.g.Themedicineworkedwell.3.aslongas只要；長達e.g.Youcangoouttoplayaslongasyoufinishyourhomework.e.g.IhavetaughtEnglishaslongasnineyears.,Readandanswerthequestion.Athiefstoleabeautifulcellphonefromayounggirl.Heranawayveryquicklyandthenhidinasecretplace.Tohissurprise,whenhewasusingthecellphone,hewascaughtbythepolice.Doyouknowwhy,BluetoothBluetoothisashortdistancewirelesscommunicationtechnology.Itprovidescoverage(覆蓋）ofupto100meters.Itsalowpowertechnologythatcanbeusedtoconnectcellphonesorcomputerwithotherdevices.,Abluetoothheadset,長長見識,根據(jù)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,當堂檢測,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飛到太空。IwishIcouldgointospacesomeday.3.我希望你的夢想能實現(xiàn)。Ihopeyourdreamwillcometrue.4.眾所周知，大多數(shù)生物體內(nèi)都有DNA，包括人。Asweknow,thereisDNAinmostlivingthings,includinghumanbeings.5.沒有人確切地知道，但是大多數(shù)人認為機器人會成為我們生活的一部分。Nooneknowsforcertain,butmostpeoplethinkrobotswillbepartofourlives.6.總而言之，這個機器人對我們很有幫助。Inshort,thisrobotisveryusefultous.,看誰能根據(jù)中文意思快速翻譯六個句子。,口語比拼,2a,Grammarfocus,Passivevoice(),TheradiowasinventedbyGuglielmoMarconiin1895.,Whenwasitdeveloped?Wherewasitdeveloped?Wherewerelaptopsinvented?,Around1998.ItwasdevelopedinKorea.TheywereinventedinJapan.,2b,Usefulexpressions,Whatsitmadeof/from?Itsmadeof/from.IwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.ThereisDNAinmostlivingthings,includinghumanbeings.Nooneknowsforcertain,butmostpeoplethinkthatrobotswillbepartofourlives.,Passivevoice被動語態(tài)was/were+done考點探究()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,被動語態(tài)綜合練習一、用所給詞的適當形式填空。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的某一時態(tài)形式+v.的過去分詞,二，將下列句子改為被動語態(tài)。1.PeopleuseradiostolearnEnglishinthepast._2.Jackwillshowmethephoto._3.TheyhaveraisedmuchmoneyfortheProjectHope._4.IoftenhearMarysingEnglishsongsathome._5.Wemustntthrowlitterabout._6.Apolicemanisrunningafterathiefinthestreet._7.PeoplecanvisitplanetslikeMars._,RadioswereusedtolearnEnglishinthepast.,Thephotowillbeshowntome./IwillbeshownthephotobyJack.,MuchmoneyhasbeenraisedfortheProjectHope.,MaryisoftenheardtosingEnglishsongsathome.,Littermustntbethrownabout.,Athiefisbeingranafterinthestreet.,PlanetslikeMarscanbevisited.,三，單項選擇。()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、詞匯：A,根據(jù)所給英漢提示寫出單詞。1.Whatarethese_(牙刷）madeof?2.AteamfromUKwerethefirstto_(克?。゛nanimalsuccessfully.3.ThelightbulbisoneofEdisons_(發(fā)明).4.Wouldrobotsliketobehumanbeings_(傭人)iftheycanthinkforthemselves?5.Wewillgo_(只要）theweatherisgood.,話題檢測,toothbrushes,clone,inventions,servants,aslongas,B，根據(jù)首字母提示補全單詞。6.ClassThreearedoinge_inthelab.7.O_scientistsfindlifeonMars,wewillhaveanewlivinghomeland.8.Hew_usnottogooutafteritwasdark,fortheroadcoveredwithsnowwasdangerous.9.Weshouldmakeac_toprotectingthewildanimals.10.Afterschool,studentsshouldhelptheirparentsdosomeh_.,xperiments,nce,arned,ontribution,ousework,二、根據(jù)漢語提示完成句子。1.Itisbadforyourhealthtoeat_(太多).2.Ourcountryhas_ChangeI_(發(fā)射)spacesuccessfully.3._(據(jù)說）thatJesusChristwasborninabarn.4._（到目前為止)，wehavefinishedalotofjobs.5.Jimspen_(相似)mine.6.Weshouldhavethegoodhabitof_(獨立思考).7._(總而言之),heisagreatastronaut.8.Ibelieveourhopewill_(變成現(xiàn)實).,toomuch,sentinto,Itissaid,Sofar,issimilarto,thinkingforourselves,Inshort,cometrue,三、情景對話，選擇正確的應答語。A:Hi,Juanjuan,Whatareyoudoing?B:IamwatchingTV.A:_B:Sorry,Idontknow._A:Thatsbecauseofman-madesatellites.B:_A:Theycansendandreceivemessages.Withtheirhelp,ChinacansenditsTVandradioprogramstotheothersideoftheworld._w