[课件]高中英语选修八Unit2-Warming-up-and-Reading

Warmingup&ReadingTwinsTheyarebornnaturallyandidenticalinsexandappearance.AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗。富贵竹插枝即活Thegardenercuttheplant,thenthecuttingsproduceanothernewplant.1996cloningsheepsShewasclonedwhiletheotherswerebornnaturally.Itistheexactcopyofanothersheepandthefirstclonedmammal.Dollythesheep没爹没娘的多莉羊2001cloningcattle我国成功繁殖克隆兔体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002cloningcats2002年4月十六日美国第一头克隆牛“艾米”产下牛犊喜作妈咪。2005cloningdogsCloningisawayofmakinganexact_____ofanotheranimalorplant.Whatiscloning?copyWhatisthedifferenceamongthem?NaturalcloneMan-madeclonecloneArethefollowingclonesthesame?man-madeclonesnaturalclonesClone?NaturalcloneMan-madecloneNaturalcloneisonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.Man-madecloneisoneproducedthroughhumanintervention(介入).Oh!MyGod!Iwascloned!Isitgoodcloningpeople?Inpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-reading1.Whatisaclone?Acloneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced？Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantsproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning？Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease).Itcanhelpinfertilepeoplehavebabies.4.Whatproblemsmayarisewhenhumansarecloned?•Peoplemaywanttoclonethemselvessotheycanliveforever.•Peoplemaywanttoclonedeadchildren.•Peoplemaywanttoclonetheirfavouritepets.PredictionWhatdoyouthinkthearticleisaboutbyreadingthisheadline?Whatisthemainideaofthepassage?Thepassagetellsusthatanimalcloningraised__________andscientistsarenotsureaboutits______.argumentsfuture1.Whatisthemaintopic?A.Cloning.B.Dollythesheep.C.Itwillleadustosomeplaces.2.Whatisthewritingstyle?A.Expositive(说明性的).B.Descriptive.C.Argumentative(议论性的).AALearningtips:Thepassageiswrittenintheexpositivestyle.Thatistosaythetextisinthethirdpersonandinfactualandformallanguage.Itgivesdifferentpointsofviewanddoesnottrytopersuadethereadertomakeuphis/herownmind.CarefulreadingThemainideaofeachparagraph.1.Cloningis________________________________________________________2.Cloninghas____________uses.3.The_________ofDolly.4.The________ofcloninginsociety.5.Theattitudestowardscloning.awayofmakinganexactcopyofanotheranimalandplant.problemstwomajoreffectIthappensbothin________andin_______.Theycanbeclonedby__________and________.plantsanimalsthemselveshumansNaturalcloneMan-madeclonePara1:Thedefinitionofcloning1.Howmanymajorusesdocloninghave?Firstly,…commercial…Secondly,…research…2.Howmanyfemalesheepparticipateinthecloningofanewsheep?3.WhenwasthecloningofDollythesheepborn?3Para2:Themajorusesandproceduresofcloning1996AboutDollythesheepEncouragingnews:Dollydeveloped__________.Disturbingnews:normallyDollylivedforsixyearsandahalfyears,halfthelengthofthelifeoftheoriginalone.Para3:TheproblemsofDollyTheword“controversial”inPara4probablymeans________.A.complicatedB.arguableC.importantPara4:TheimpactofDollyBTrueorfalse:1.PeoplefearedthatClonedHitlerswoulddoharmtotheworld.2.Alltheresearchintohumanbeingswillbeforbidden.3.Somecountrieswillusecloninginawiseway.Para5:People’sreactiontocloningSomegovernmentsforbaderesearchintohumanbeings.TTF1Readthepassageandanswerthesequestions.Comprehending1.Whatarethetwomajorusesofcloning?Thefirstuseistoproducecommercialquantitiesofplants.Thesecondistoresearchonnewplantsspeciesanddomedicalresearchonanimals.2.Whyisiteasiertomakecommercialplantclonesthananimalclones?Cloningplantsisstraightforward,butthecloningofanimalsisverycomplicated.3.Whatwasthefirstclonefromanadultanimal?Atwhatagedidthisclonedie?4.Whyiscloningcontroversialinsomecountries?Dollythesheep.Shediedin2003whenshewassixandahalfyearsold.Formoralandreligiousreasons.ProblemsordangersofcloningAdvantagesofcloning2Fillinthechart.ProblemsordangersofcloningAnimalclonesmaydeveloptheillnessesofolderanimals.Animalclonesmaydieyoungerthanthedonoranimals.Evilleadersmaywanttoclonethemselves.Therearemoralobjectionstocloninghumanbeings.AdvantagesofcloningMedicalcloningcouldproducecuresforseriousillnessesinhumans.Cloningplantscanproduceplantsofsimilarqualityforsale.Cloningplantscanbeusefulforresearchonnewplantspecies.Cloningcanhelpsaveendangeredanimals.3Whatdoyouthinkisthewriter’spointofviewinthisreadingpassage?Isitinfavourofcloningoragainstit?Ithinkthewriterisbecauseimpartialhe/shedoesnotstateanypersonalopinionaboutcloning.Practiceactivity:DebateＶＳAreyouinfavorofcloningoragainstcloning?Whatisyourpointofviewonit?