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ID:39006059
大小:4.20 MB
页数:35页
时间:2019-06-23
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1、Cloning:whereisitleadingus?Unit2Book8Unit2CloningAims:1.Gettoknowthedefinitionofcloning.2.Gettoknowthestrengthandweaknessofit.3.MakeclearhowthefirstcloningsheepDollycameintobeingandbeabletoretelltheprocedure.SkimmingSkimthetexttofindouttheanswerstothefollowingqu
2、estions.Questions1)Whatiscloning?2)What'stheusageofcloning?3)Whatareitsbenefits?4)Whatareitsproblems?Cloningisawayofmakinganexactcopyofanotheranimalandplant.Ithappensbothin______andin_______.Theyareboth___________plantsanimalsThedefinitionofcloningnaturalclonesW
3、hile-ReadingPara1“beheretostay”isanidiom,whichmeans“beacceptedandusedbymostpeople”Question1Whatisthetopicsentenceofthefirstparagraph?Cloninghasalwaysbeenwithusandisheretostay.TwinsTheyarebornnaturallyandidentical(一模一样)in____and___________.sexappearance_________
4、cloneNaturalNaturalcloneQuestion2.Whataretheusages?Firstly,…commercial…Secondly,…research…Para2Inthisparagraph,theword“straightforward”means____.A.uncomplicatedB.honestC.frankD.difficultCloningplantsisstraightforwardwhile(表对比)cloninganimalsisverycomplicated.Thec
5、loningofDollythesheepsucceededbecause____.A.it’seasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailedDetailsTheirdeterminationandpatienceofthesc
6、ientistspaidoff.DollythesheepQuestion:HowdoesDollydifferfromothersheep?Shewasclonedwhiletheotherswerebornnaturally.Dollywasa______sheep.bedifferentfromclonedIn1996,asheepcalledDollywasborn.Itisthefirstmammaltobecloned.Itisconsideredtobethegreatestsuccessinthedeve
7、lopmentofcloning.ChallengeyourselvesDoyouknowabout:HowdidtheclonedsheepDollycomeintobeing?Trueoffalse:Fourfemalesheepparticipateinthecloningofanewsheep.Electricityisneededintheprocedure.SheepBprovidesasomaticcellfortheclone.ThelambistheexactcopyofsheepA.TFTFFirs
8、t,thefactthatDollydeveloped______inanaturalwaywas__________.Later,thenewsthatDollyhadbecomeseriouslyillwas__________.Finally,theproblemthatoccurredtothescienti
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