新人教版选修八Unit2 Using Language课件

Unit2cloningusinglanguageTheReturnoftheDinosaurs?Answerthefollowingquestions:1.HaveyoueverseenthefilmJurassicPark?Dopeoplelikethisfilm?Whatanimalsdoyouseeinthefilm?Aretheyrealdinosaurs?Warmingup(4ms)2.Doyoulikedinosaurs?Canyouseetheminourreallife?Why?Warmingup(4ms)3.Doyouthinkitispossibletoclonedinosaurs?Ifnot,why?Ifyes,doyouthinkthat’sgoodforhumanbeings?Why?Warmingup(4ms)Readthetext,thentellthefollowingsentencesaretrueorfalse.(Studentscandiscussinpairs.)1.Scientistsarestillexperimentingwithcloningmammalsbecausetheythinkitcanmakemoney.2.Theanimalsthathavedisappearedfromtheearth,likedinosaurs,canbebroughtbacktolifethroughcloning.3.Ifwecancloneanyextinctanimals,weshouldletthemliveinazoo.FFFReading--Iscanning(5ms)GivesomereasonswhyitiseitherimpossibleorunsuitabletocloneextinctanimalsReason1:Reason2:Reason3:YouneedperfectDNTThereisnotenoughdiversityforclonedanimalstoovercomenewdiseases.Itwouldbeunfairtocloneanyextinctanimalsiftheywouldhavetoliveinazoo.AdvantageofdiversityDisadvantageofdiversityDiversityinagroupofclonedanimalsIfthereisanewillnesssomeoftheseanimalsmaydie,butotherswillsurviveandpassedontheabilitytoresistthatdiseasetotheirchildren.Theywouldallhavethesamearrangementofgenesandsotheymightalldieofthesamedisease.Reading--IIDetailreading(6ms)Readthetext,thenanswerthefollowingquestions.(Studentscandiscussinpairs.)1.Whyshould’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?2.Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?3.Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?1.Whyshould’tyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?Therewillnotbeenoughgeneticvariation(遗传变异)inthegrouptobeabletoresistnewillnesses.2.Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?Itisnotagoodideatocloneananimalthatwouldhavetoliveinazoobecauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.3.Whycan’tyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?TheDNAofanimalsmorethan10,000yearsoldisnotsuitableforcloning,foritcan’tsurvivesolong.Reading--IIIArgument(10ms)1.ReadthepassageagainandhaveaargumentaccordingtotherequirementofEx.2onPage16.2.Studentsworkingroups,whendiscussing,theheadofeachgroupshouldwritedowntheopinionsofallthemembers.3.Asksomevolunteerstoshowtheiropinions.Languagepoints1.Thepopularityofthefilmproveshowinterestedordinarypeopleareinthesubjectpopularpopularity2.alongwayfromdoingsth.3.Do/make/carryout/performanexperimenton/in/with…做...实验,对...做实验4.fromtimetotime有时；偶尔；时常5.bring…backtolife使复生6.Diversityinagroupmeanshavinganimalswiththeirgenesarrangedindifferentways.meandoingsth.havesth.done7.butotherswillsurviveandpassontheabilitytoresistthatdiseasetotheirchildren.passon…to…传递;留给