选修8==Unit2Reading.ppt
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1、ReadingTwinsTheyarebornnaturallyandidenticalinsexandappearance.A strawberry plantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.一株草莓依靠它沿地一株草莓依靠它沿地“爬走爬走”的匍匐茎的匍匐茎,一年内就能长出数百株草莓苗。一年内就能长出数百株草莓苗。富贵竹插枝即活富贵竹插枝即活Thegardenershouldcuttheplant,thenthecuttingproduceanothernewplant.1996 clonin
2、g sheeps2001 cloning cattle我国成功繁殖克隆兔我国成功繁殖克隆兔 体形要比普通兔大许多体形要比普通兔大许多2002年年5月月中旬成功地中旬成功地繁殖了一只繁殖了一只胚胎细胞胚胎细胞克隆兔。克隆兔。2002 cloning cats2002年年4月月16日日美国第一头克美国第一头克隆牛隆牛“艾米艾米”产下牛犊产下牛犊。2005 cloning dogsInpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.P
3、re-reading 1.Whatisaclone?Acloneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced?1)Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalclon
4、ing).2)Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning?Medicalcloningcanhelpcureseriousillnessesthatruinonesqualityoflife(suchasParkinsonsdiseaseorAlzheimersdisease).Itcanhelpinfertilepeoplehavebabies.4.Whatpro
5、blemsmayarisewhenhumansarecloned?Peoplemaywanttoclonethemselvessotheycanliveforever.Peoplemaywanttoclonedeadchildren.Peoplemaywanttoclonetheirfavouritepets.1.Whatisthemaintopic?_A.Cloning.B.Dollythesheep.C.Itwillleadustosomeplaces.2.Whatisthewritingstyle?_A.Expositive(说明性的说明性的).B.Descriptive.C.Argum
6、entative(议论性的议论性的).A A Learning tips:Thepassageiswrittenintheexpositive style.Thatistosaythetextisinthethirdpersonandinfactualandformallanguage.Itgivesdifferent points of viewanddoesnottrytopersuadethereadertomakeuphis/herownmind.3.Dollythesheep_.A.lookedexactlylikethesheepthatprovidestheegg.B.wasth
7、eexactcopyofthesheepthatprovidesthenucleus.C.lookedlikethesheepthatgavebirthtoit.D.hadthecharacteristicsofallthreesheep.B 4.Itcanbeinferredfromthepassagethataclonedanimal_.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallydiesearlierthantheoriginaloneD.isusuallyashea
8、lthyastheoriginaloneC 5.Whichofthefollowingisnotanadvantageofcloning?_A.Cloningcanbeusedformedicalpurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Cloningcanhelpkeepanimalsfrombecomingextinct.D.Famouspersonswhohavepassedawaycanbecloned.D 6.Whichofthefollowingiswrong?_A.Clonedpeoplecouldlivef
9、orever.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherrealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.A 7.WhichstatementisNOTtrue?_A.Cloningissomethingthathasbeendevelopedquiterecently.B.Twinsthatlookexactlythesameareoriginallyfromthe
10、sameegg.C.Cloningisusedbygardenerstomakemoremoney.D.Animalcloningismuchmoredifficultthanplantcloning.A 8.ThecloningofDollythesheepsucceededbecause_.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotheratt
11、emptstoclonemammalsfailedB9.Thelambisthecloneofthecellfromsheepbecause_.A.itprovidestheeggcellB.itgivesbirthtothelambC.itprovidesthenucleusD.itisafemalesheep10.Thesheepthatdonatedthesomaticcellmostprobablylived_years.A.3B.6C.9D.12CD 11.Themainideaofthetextis_A.animalcloningisveryvaluableandcanbenefi
12、ttheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.D12.WhichofthefollowingisNOTaproblemordangerofcloningmentionedinthetext?_A.Evilleadersmaywanttoclonethem
13、selves.B.Animalclonesmaydeveloptheillnessofolderanimalsandmaydieyoungerthanthedonoranimals.C.Therearemoralobjectionstocloninghumanbeings.D.Toomuchcloningmayleadtothedestructionofthebalanceofnature.D 13.Wecaninferfromthelastthreeparagraphsthat_.A.thenormaldevelopmentofDollyhadnoeffectonthecloningofot
14、herspecies.B.Dollysseriousdiseaseandfinaldeathdisturbedthewholeworld.C.Dollysuccessfullyclonedanewlambwiththehelpofcloningscientists.D.therewereargumentsaboutanimalcloningandconcernsaboutthefutureofcloning.DCareful reading Themainideaofeachparagraph.1.Cloningis_2._2.Cloninghas_uses.3.The_ofDolly.4.T
15、he_ofclonginginsociety.5.The_towardscloning.awayofmakinganexactcopyofanotheranimalandplant.problemstwomajoreffectattitudesIthappensbothin_andin_.Theycanbeclonedby_and_.plantsanimalsthemselveshumansNatural cloneMan-made clonePara 1:The definition of cloning1.Howmanymajorusesdocloninghave?Firstly,comm
16、ercialSecondly,research2.Howmanyfemalesheepparticipateinthecloningofanewsheep?3.WhenwasthecloningofDollythesheepborn?3Para 2:The major uses and procedures of cloning1996AboutDollythesheepEncouragingnews:Dollydeveloped_.Disturbingnews:normallyDollylivedforsixandahalfyears,halfthelengthofthelifeoftheo
17、riginalone.Para 3:The problems of DollyTheword“controversial”inPara4probablymeans_.A.complicatedB.arguableC.important Para 4:The impact of DollyB Trueorfalse:1.PeoplefearedthatClonedHitlerswoulddoharmtotheworld.2.Alltheresearchintohumanbeingswillbeforbidden.3.Somecountrieswillusecloninginawiseway.Pa
18、ra 5:Peoples reaction to cloningManygovernmentsforbaderesearchintohumanbeings.T TF Hitler:anevilleader意大利狂人医生意大利狂人医生:安蒂诺里安蒂诺里冒死也要克隆人的冒死也要克隆人的科学家科学家:布瓦瑟利耶布瓦瑟利耶1 Read the passage and answer these questions.Comprehending 1.Whatarethetwomajorusesofcloning?Thefirstuseistoproducecommercialquantitiesofplan
19、ts.Thesecondistoresearchonnewplantsspeciesanddomedicalresearchonanimals.2.Whyisiteasiertomakecommercialplantclonesthananimalclones?Cloningplantsisstraightforward,butthecloningofanimalsisverycomplicated.3.Whatwasthefirstclonefromanadultanimal?Atwhatagedidthisclonedie?4.Whyiscloningcontroversialinsome
20、countries?ThefirstclonefromanadultanimalwasDollythesheep.Shediedin2003attheageof6andahalf.Cloningiscontroversialinsomecountriesformoralandreligiousreasons.ProblemsordangersofcloningAdvantagesofcloningAnimalsmaydeveloptheillnessesofolderanimals.2 Fill in the chart.Medicalcloningcouldproducecuresforse
21、riousillnessesinhumans.AnimalclonesmaydieyoungerthanthedonoranimalsEvilleadermaywanttoclonethemselves.Therearemoralobjectionstocloninghumanbeings.Cloningplantscanproduceplantsofsimilarqualityforsale.Cloningplantscanbeusefulforresearchonnewplantspecies.Cloningcanhelpsaveendangeredanimals.3Whatdoyouth
22、inkisthewriterspointofviewinthisreadingpassage?Isitinfavourofcloningoragainstit?Ithinkthewriteris_because_impartialhe/shedoesnotstateanypersonalopinionaboutcloning.1.Doyousupporttheideaofproducinghumanembryos(胚胎胚胎)formedicalpurposes?Why?2.Doyouthinkitagoodideatouseclonedhumansfororgan(器官器官)transplan
23、ts?Why?3.Doyouthinkaclonedhumanshouldhavehumanrights?Why?4.Doyouthinkclonedhumanswillhavethesametalentsastheoriginalones?Why?DiscussionAsacoinhastwosides,everythinghastwoaspects.First,ifthecloningisusedinacorrectwayitcanbringmanyconveniencestous.Suchas:curingseriousillnessesandbeingusedtoproducecomm
24、ercialquantitiesofplants.Ontheotherhand,ifthecloningisusedinanevilwayitcancausemuchtrouble:suchasmoralquestions.Practice activity:Debate Areyouinfavorofcloningoragainstcloning?Whatisyourpointofviewonit?1.Thishappensinplantswhengardenerstakewhentwinsidenticalinsexand1)“whengardenerstakecuttingsfromgr
25、owingplantstomakenewones,whentwinsidenticalin是两个时间状语从句。是两个时间状语从句。when引导的时间状语从句中从句的动作可以与引导的时间状语从句中从句的动作可以与主句的动作同时发生,也可以先于主句的动作。主句的动作同时发生,也可以先于主句的动作。Dontbeafraidofaskingforhelp_itisneeded.(03,全国全国)A.unlessB.sinceC.althoughD.whenD 2)happenvi.occurbychance;takeplace(偶然地偶然地)发生发生;出现出现happentodohappentosb.
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