全新版大学英语综合教程第三册教案Unit8

新疆医科大学外语教研室全新版大学英语三册教案Unit81Unit8CloningⅠ.SuggestedTeachingPlanObjectivesStudentswillbeableto:1.understandthemainidea(cloningisatwo-edgedsword)andstructureofthetext;2.appreciatethewritingstrategiesemployedbytheauthor;3.masterthekeylanguagepointsandgrammaticalstructuresinthetext;4.conductaseriesofreading,listening,speakingandwritingactivitiesrelatedtothethemeoftheunit.TimeAllotment1stperiod2ndperiod3rdperiod4thperiod5thperiodPre-reading;While-reading(PartI)While-reading(PartI,PartII)While-reading;Post-reading;CheckonSs’homereading(TextB)Theme-RelatedLanguageLearningTasksPre-readingtasks1.TasksSsthefollowingquestionsontherecordedinterview:(5minutes)—WhatdoesProf.Greelythinkofhumancloning?(Wemustdistinguishdifferenttypesofhumancloning.Somearejustified;othersarenot.)—Whatisthegreatestproblemwithhumanreproductivecloning?(safety)2.Out-of-classresearchproject(30minutes)1)Theresearchprojectshouldbeassignedattheendofthelastunit.SsformgroupstouselibraryresourcesandInternetresourcestogetanswerstothefollowingquestions:—Whatiscloning?—Giveabriefhistoryofthescientificresearchintocloning.—Whatarethemajorprosandconsofhumancloning?—Duringyourresearch,whatnewvocabularyitemshaveyoucomeacrossthatarerelatedtocloning?2)Groupsreporttoclass.Tosavetimeandgivepresentationopportunitiestomoregroups,noone新疆医科大学外语教研室全新版大学英语三册教案Unit82groupneedanswerallthequestions.Agroupmembermaywritedownnewvocabularyitems(inbothEnglishandChinese)ontheblackboardwhileanothermemberispresenting.3.Tmayleadintothetextbysaying:Bynowmanyofyoumayhavealreadyformedyourownideaabouthumancloning,butlet’srefrainfromopinionsforthemoment.TheauthorofTextAisasciencereporter.Likeagoodjournalist,let’sfirstmakethefactsclear.(2minutes)While-readingtasks1.PartⅠ(30minutes)1)Ssscanthefirstthreeparagraphstoseewhereatensechangetakesplace.Bythusdoingtheywillseethatthefirsttwoparagraphsactasintroductiontothewholeessay.2)TasksSsthefollowingquestions:—ThisisapieceofjournalisticwritinglikeTextA,Unit7.Whatimportantroledobeginningparagraphsplayinjournalisticwriting?—Whydidn’ttheauthorstartfromtheverybeginningofcloningresearch,butstartwiththebirthofDolly?(seeTextAnalysis)3)TexplainslanguagepointsinPartIandgivesSspractice(seeLanguageStudy).4)SssumupthemainideaofPartI.2.TexplainslanguagepointsintherestofthetextandgivesSspractice(seeLanguageStudy).(60minutes)3.SsdoTextOrganizationExercises1and2.(15minutes)Post-readingactivities1.Learningaboutwritingstrategy(25minutes)1)SsreadWritingStrategyinthisunit.2)Ssdotheafter-textstructureexerciseon“Itistrue...,but...”and“True...,but...”,sothattheyrealizethisisoneformofconcession.3)TremindsSsthatthisisapieceofjournalisticwriting,theauthorofwhichmustrefrainfrompassingjudgment.He/Sheconcedestoachieveobjectivity.4)Ssfindotherexamplesofbalanced,objectivewriting,(seeTextAnalysis)2.TguidesSsthroughsomeafter-textexercises.(35minutes)3.TchecksonSs’homereading(TextB).(3minutes)4.SsdoPartIV:Theme-RelatedLanguageLearningTasks.(1period)新疆医科大学外语教研室全新版大学英语三册教案Unit83Ⅱ.TextAnalysisThistexthassomefeaturesincommonwithTextA,Unit7:aneye-catchingintroductionandobjectivity.ThetextstartswiththebirthofDolly,becauseitisacriticalpointincloningresearch.Readerinterestisfurtherarousedbythelow-keytone.Whynoexcitement,whynochampagne,whywerefewpeoplearound?Readersarethenreadytobetoldanobjectiveaccountabouthumancloning.The“father”ofDollyislevel-headedabouthisachievement,soistheauthor.ShequotesWilmutandOppenheimertoshowhowsciencecanbeadouble-edgedsword.BeforelistingthemanybenefitsofhumancloninginPartIV,shefirstidentifiestheethicalproblemsinvolvedinPartIII.Inherarticlesheasksmanyquestions,towhichshegivesnoanswer.Ifshesaidthatthereweredefiniteanswers,shewouldnotbeobjective.However,comparedwithTextA,Unit7,thewordchoiceismoreelaborate;sentencesandparagraphsgrowlongerandmorecomplex.Afterall,thisisaboutscienceandethics!Ⅲ.CulturalNotes1.clone:agroupoforganismsorcellsthataregeneticallyidentical,havingbeenproducedfromoneparentbyasexualreproduction.Theindividualorganismsorcellsareprecisecopiesoftheparentandgeneticallyidenticaltoit.Clonesarefoundnaturallyamongsingle-celledorganisms(suchasbacteria),afewinvertebrates(suchascorals),andsomeasexuallyreproducingplants(asintheproductionofrunnersbyastrawberryplant).Inagriculture,plantcloningcanbeusedtoadvantage,inthatindividualswithdesirableproperties,suchaspest-resistanceorhighgrowthrates,canbereplicatedexactlywithouttheunpredictableresultsassociatedwithsexualreproduction.Artificialcloningofanimalsandcellscanbeachievedbyteasingapartthecellsoftheearlyembryo.Similarly,cellscapableofgrowingintomatureplantscanbeobtainedfromplantgrowth-regions(meristems).IngeneticengineeringcloningreferstothecopyingofDNAmolecules.2.geneticengineering:thedeliberatemodificationofthegeneticmake-up(genome)ofanorganismbymanipulationofitsDNA.GeneticengineeringtechniquesincludecellfusionandtheuseofrecombinantDNA(rDNA).Sincethelate1960sthesetechniqueshaveheldoutthemostexcitingpromiseforbiotechnology.Insuchanewfieldcontroversyinevitablyabounds.Worriesconcerningreleaseofgeneticallynov