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,doyouthinkthatsgoodforhumanbeings?Why?,Warmingup(4ms),Readthetext,thentellthefollowingsentencesaretrueorfalse.(Studentscandiscussinpairs.),Scientistsarestillexperimentingwithcloningmammalsbecausetheythinkitcanmakemoney.Theanimalsthathavedisappearedfromtheearth,likedinosaurs,canbebroughtbacktolifethroughcloning.Ifwecancloneanyextinctanimals,weshouldletthemliveinazoo.,F,F,F,Reading-Iscanning(5ms),Givesomereasonswhyitiseitherimpossibleorunsuitabletocloneextinctanimals,Reason1:Reason2:Reason3:,YouneedperfectDNTThereisnotenoughdiversityforclonedanimalstoovercomenewdiseases.Itwouldbeunfairtocloneanyextinctanimalsiftheywouldhavetoliveinazoo.,Diversityinagroupofclonedanimals,Ifthereisanewillnesssomeoftheseanimalsmaydie,butotherswillsurviveandpassedontheabilitytoresistthatdiseasetotheirchildren.,Theywouldallhavethesamearrangementofgenesandsotheymightalldieofthesamedisease.,Reading-IIDetailreading(6ms),Readthetext,thenanswerthefollowingquestions.(Studentscandiscussinpairs.),Whyshouldtyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?WhycantyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?,Whyshouldtyoucloneanextinctanimalunlessthereisenoughdiversityinthegroup?,Therewillnotbeenoughgeneticvariation(遗传变异)inthegrouptobeabletoresistnewillnesses.,2.Whyisitwrongtocloneanextinctanimalifitwouldhavetoliveinazoo?,Itisnotagoodideatocloneananimalthatwouldhavetoliveinazoobecauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.,3.WhycantyouclonetheDNAofanimalsthathavebeenextinctlongerthan10,000years?,TheDNAofanimalsmorethan10,000yearsoldisnotsuitableforcloning,foritcantsurvivesolong.,Reading-IIIArgument(10ms)1.ReadthepassageagainandhaveaargumentaccordingtotherequirementofEx.2onPage16.2.Studentsworkingroups,whendiscussing,theheadofeachgroupshouldwritedowntheopinionsofallthemembers.3.Asksomevolunteerstoshowtheiropinions.,Languagepoints1.Thepopularityofthefilmproveshowinterestedordinarypeopleareinthesubjectpopularpopularity2.alongwayfromdoingsth.3.Do/make/carryout/performanexperimenton/in/with做.实验,对.做实验,4.fromtimetotime有时；偶尔；时常5.bringbacktolife使复生6.Diversityinagroupmeanshavinganimalswiththeirgenesarran