高中英语：Book8 unit2 warming up pre-reading reading课件人教版选修8.ppt

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1、cloningReadingWhereisitleadingus?Book8unit2Naturalcloneisonethatoccursinanaturalformofcloningwithouthumanhelp.Man-madecloneisonethatisproducedthroughhumanintervention(介入).WarmingupTwokindsofclones:Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowth

2、eydiffer.DiscussionAstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.NaturalcloneGrowingnewplantsMan-madeclone富贵竹插枝即活Thegardenercutstheplant,andthenthecuttingproducesanothernewplant.Man-madecloneTwinsTheyarebornnaturallyandidenticalinsexandappearance.Naturalclon

3、eShewasclonedwhiletheotherswerebornnaturally.Dollywasa______sheep.clonedHowdoesDollydifferfromothersheep?Man-madecloneIn1996,asheepcalledDollywasborn.Itisthefirstmammaltobecloned.Itisconsideredtobethegreatestsuccessinthedevelopmentofcloning.Thefollowingaresomephotosaboutcloning.Seehowmuchyoukno

4、waboutit.2001cloningcattle2003Cloninghorsecloningrabbits2002cloningcats2005cloningdogs克隆的荧光小猪(左)和正常小猪(右)SkimmingPleasereadthepassagequicklyandgetthemainidea,andthenfinishthefollowingexercisesingroups.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcou

5、ldbemisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.主旨大意2.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandwork

6、edhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailedB细枝末节3.Whatispeople'sfearabouthumancloning.Whichofthefollowingiswrong?A.ClonedHitlerswoulddoharmtotheworld.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherr

7、ealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.4.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.9D.13推理判断5.Wecaninferfromthelastthreeparagraphsthat___.ThenormaldevelopmentofDollyhadn