高中英语优秀教案：Unit2--Cloning(新人教版选修8).doc

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1、Unit2CloningTheFirstPeriodwarmingupAims1.Talkaboutcloning2.PracticeexpressingandsupportinganopinionContentsTaskone:LookingandspeakingInpairs,lookatthepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.A.DollythesheepB.Astra

2、wberryplantC.TwinsD.IdenticaldogsTasktwo:QuestionsaboutcloningWhatisaclone?Howisacloneproduced?Whatbenefitscanhumansgainfromcloning?Whatproblemsmayarisewhenhumansarecloned?Taskthree:FreetalkInpairs,discusswhatyouunderstandaboutcloning,thenlistthequestionsyouwa

3、nttofindout.Shareyourlistswithoneanother.1.Shouldweclonehuman?2.Couldcloningreplacesexasthemeansofcreatingnewhumanlife?3.Couldaparentcloneachildwhoisdyingofaterminalillness?TheSecondPeriodReadingAims:1.HelptheSstoknowhowtodescribecloningandhowtocatchthedetails

4、ofthetext.2.ActivatetheSstoshowtheiropinionsaboutthecloningandenabletheSstowriteandarticleonthisdebate.Contents:Leadinginbyrevision.Taskone:FastreadingWhatisaclone?Showthefollowing.1.Cloningmeansmakingacopyofananimaloraplant.(F.exact…another)2.Gardenerscanmake

5、alotofmoneybycloningplants.(T.)3.Cloninganimalsisascomplicatedascloningplants.(F.morethan)4.Dollythesheepwasthefirstsuccessfulcloneofamammal.(T.)5.Naturalcloneshappeninanimalsaswellasinplants.(T)Tasktwo:CarefulreadingReadthetextagain,trytoanswerthefollowingque

6、stionsandfindoutthemainideaofeachparagraph.Questions:1.What’sthemainideaofthetext?2.Howmanyyearsdidthesheepthatdonatedthesomaticcellmostprobablylive?3.WhydidtheCloningofDollythesheepsucceed?4.Whatdoestheword‘straightforward’meaninthesecondparagraph?5.Whatisthe

7、writer’sattitudetowardcloninginthispassage?Themainideaofeachparagraph:Para.1Cloningisawayofmakingancopyofanotheranimalandplant.Para.2Cloninghastwomajoruses.Para.3TheproblemsofDolly.Para.4TheeffectofDolly.Para.5Itisforbiddentoclonehumanbeing.Taskthree:Notesford

8、ebating:Shouldweusecloning?Argumentforcloning:CloningwillbebeneficialtohumansWecouldusecloningtocureillnesses.Argumentsagainstcloning:healthyrisksformmutationofgenesemotionalrisksa