Unit4AmazingScienceUnit4AmazingScienceTopic2Topic2WhenwasitWhenwasitinventinvented?ed?Haveyouevergotlostsomewhere?Whatmethoddidyouusetofindyourdirection?（影片）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.in…direction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.DoyouknowwhyBluetoothBluetoothisashortdistancewirelesscommunicationtechnology.Itprovidescoverage(覆盖）ofupto100meters.It’salowpowertechnologythatcanbeusedtoconnectcellphonesorcomputerwithotherdevices.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,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere________ourplanets.hereositionsedkyxploreWhathaveyoulearntaboutinthistopic?Canyousaysomethingaboutoneofthem?1.Rocket2.Cloning3.Robots4.GPS5.Othergreatinventions1.它是由什么制成的？What’sitmadeof/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。2aGrammarfocusPassivevoice()ⅡTheradiowasinventedbyGuglielmoMarconiin1895.Whenwasitdeveloped?Wherewasitdeveloped?Wherewerelaptopsinvented?Around1998.ItwasdevelopedinKorea.TheywereinventedinJapan.（录音）2bUsefulexpressionsWhat’sitmadeof/from?It’smadeof/from...IwishIcouldgointospacesomeday.Ihopeyourdreamwillcometrue.ThereisDNAinmostlivingthings,includinghumanbeings.Nooneknowsforcertain,butmostpeoplethinkthatrobotswillbepartofourlives.（录音）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.areinventedCBCACGrammarfocus被动语态综合练习一、用所给词的适当形...
