高中英语 Unit2(Cloning)课件人教版选修8 课件VIP免费

UNITTWOREADINGCLONING:WHEREISITLEADINGUSSkimthetexttofindouttheanswerstothefollowingquestions.1.Whatiscloning?SkimmingCloningisawayofmakinganexactcopyofanotheranimalandplant.Skimthefollowingpassageandmatchtheparagraphwiththecorrectsentence.Para1A.TheproblemsofDollyPara2B.ThetwomajorusesofcloningPara3C.TheattitudestowardscloningPara4D.ThedefinitionofcloningPara5E.TheeffectofcloninginsocietyScanning1.Doyouthinkcloningplantsisstraightforwardorcomplicated?Whataboutcloninganimals?Cloningplantsisstraightforwardwhilecloninganimalsiscomplicated.TheimportanteventsinanimalcloninghistoryIn1952tadpolewascloned.ItisthefirstanimaltobeclonedIn1963,anAsiancarp(鲤鱼）wascloned.Tenyearslater,aChinesescientistnamedTongdizhouclonedaEuropeancarp.In1996,asheepcalledDolleywasborn.Itisthefirstmammaltobecloned.Itisconsideredtobethegreatestsuccessinthedevelopmentofcloning.Amacaque（猕猴）wasclonedin2000.Laterscientistsclonedmanymonkeys.Itcanbeusedtotestoutsomediseasessuchasdiabetes(糖尿病）Mules(骡子）havenoabilitytogivebirthtoababy.Amulewasclonedin2003.Itisthefirstanimalwhichlackfecundity(生育能力）tobecloned.What’sthegreatestsuccessinthedevelopmentofanimalcloning?.TheprocedureofthecloningofDollythesheepTaskIIIIntensivereadingTrueorfalse:1.Cloningmeansmakingacopyofananimaloraplant.()2.Gardenerscanmakealotofmoneybycloningplants.()3.Cloningissomethingthathasbeendevelopedquiterecently.()4.Dollythesheepwasthefirstsuccessfulcloneofamammal.()5.ThecloningofDollythesheepsucceedbecausethescientistsweredeterminedandworkhardwithpatience.()FTFTT1.Dollythesheep______.A.lookedexactlylikethesheepthatprovidestheeggB.wastheexactcopyofthesheepthatprovidesthenucleusC.lookedlikethesheepthatgavebirthtoitD.hadthecharacteristicsofallthreesheepTaskIV:Choosethebestanswer.2.Themainideaofthetext:A.Animalcloningisveryvaluableandcanbenefittheworld.B.Animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.AnimalcloningiswelldevelopedbecauseDollythesheepwasborn.D.Animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.3.Thesheepthatdonatedthesomaticcellmostprobablylived________years.A.3B.6C.9D.134.Whichofthefollowingisnotanadvantageofcloning?A.Cloningcanbeusedformedicinepurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Cloningcanhelpkeepanimalsfrombecomingextinct.D.Famouspersonwhohavepassedawaycanbecloned.Problems/dangersofcloningAdvantagesofcloningAnimalclonesmaydeveloptheillnessesofolderanimals.Medicalcloningcouldproducecuresforseriousdegenerativeillnessesinhumans.Animalclonesmaydieyoungerthanthedonoranimals.Cloningplantscanproduceplantsofsimilarqualityforsale.Evilleadersmaywanttoclonethemselves.Cloningplantscanbeusefulforresearchonnewplantspecies.Therearemoralobjectionstocloninghumanbeings.Cloningcanhelpsaveendangeredanimals.TaskIV:Fillinthechartusingtheinformationfromthetext.Practiceactivity:DebateAreyouinfavorofcloningoragainstcloning?Whatisyourpointofviewonit?ＶＳHomeworkWriteashortpassageabouttheadvantagesanddisadvantagesofcloning.Attheendofyourpassage,youcanaddyourownopinion.