高二英语人教新课标选修8Unit2 the return of the dinosaurs 课件.ppt

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1、Unit2ReadingⅡTheReturnoftheDinosaurs?霸王龙tyrannosaurus剑龙stegosaurus雷龙brontosaurus翼龙pterodactylWhat’sthemainideaofthetext?Para1explaintheimpossibilityofcloningdinosaursPara2concludethatit’sjustadreamPara3introducethetopicofthepassageReadingComprehensionIWhatisthewriter’sattitude

2、towardscloningthedinosaurs?A.Supportive.B.Neutral(中立的).C.Negative(否定的).D.Subjective(主观的).Whyisiteitherimpossibleorunsuitabletoclonedinosaurs.?(Givesomereasons.)Reason1:Reason2:Reason3:DNADiversityHabitatScientistsarestillexperimentingwithcloningmammalsbecausetheythinkitcanmake

3、money.Ifwecancloneanyextinctanimals,weshouldletthemliveinazoo.ReadingComprehensionⅡ1.Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?Becauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.2.Whyshouldn’tyoucloneanex

4、tinctanimalifthereisn’tenoughdiversityinthegroup?Becausetherewillnotbeenoughgeneticvariationinthegrouptobeabletoresistnewillnesses.Summary:Agoodpassageusuallyhasaclearorganizationorstructure.Bulletpoints(first,second,third…)Goodorusefulsentencepatterns(transitions连词)Thestructu

5、re:thethree-paragraphform(三段式)WritingThecloningofhumanbeingsFromtimetotimepeoplesuggestthatcanpossiblybebroughtbacktolifethroughcloning.Unfortunately,withwhatweknownow,thisiseitherimpossibleorunsuitable.Herearethereasons：Firstly,Secondly,Finally,SoIthink,basedonwhatweknownow,y

6、oucannot.Itismerelyadream.What’syouropinionofcloningdinosaurs?What’syouropinionofcloninghumanbeings?FreeTalkDiscussionTheCloningofHumanBeingsStemcells(干细胞)areresponsiblefordevelopingandrepairingthebodythroughoutlife.Asaresult,theymightbeusedtorepairdamagedordiseasedorgansandti

7、ssues.Researchersarelookingoncloningasawaytocreategeneticallyengineeredhumanstemcellsforresearchandmedicalpurposes.Tocloneornottoclone:thatisthequestion.Humancloningishighlycontroversialandraisesanumberofproblem.Whywouldpeoplewanttoclonehumans?Oneimportantreasonistohelpchildle

8、sscoupleshavechildren.Fromatechnicalpointofview,beforehumansa