高中英语 Unit 2 Cloning课件 新人教版选修8.ppt

cloning unit2 inthemoviejurassicpark scientistsclonedinosaursbyusingthednathatwaspreservedformillionsofyears however thereistroublewhenthecloneddinosaursturnoutfiercerandsmarterthanexpected candinosaursreallybecloned theoretically theycan allthatwouldberequiredisdnafromanextinctdinosaurandacurrentlylivingcloselyrelatedspecieswhichwouldactasasurrogatemother 代孕母亲 infact thereiscontinuingresearchtoclonethewoollymammothbyextracting 提取 thednafromfrozenanimals actually cloningisaphenomenonthatoccursnaturallyinawidevarietyofspecies wheneveryouseeapairofidenticaltwins theyareexamplesofnature sclones althoughscientistshavebeencloningcertainplantslikethecarrotquitesuccessfullyfordecades attemptsatcloninganimalshavenotbeenassuccessful however theybeganlongbeforethebirthofdolly thesheep thefirstmammaltobesuccessfullycloned cloninghumansdoesgiverisetosomemisgivings raisinganumberofmoralproblemsinvolved infact thesocialinfluencesofproducinghumansartificiallywerebrilliantlyexploredinthefamousnovelbravenewworldbyaldoushuxley andalsointhemovietheisland humancloningisbasicallyaboutcreatingagenetically 基因地 identicalcopyofapreviouslyexistingperson whywouldsomepeoplechoosetoclonehumanbeings well generally itcouldmakecouplesunabletohavebabieshavetheirownchildren replacingadeadchildisalsoanotherreasonwhysomepeoplehaveexpressedinterestinthetechnology 文章大意 本文是说明文 介绍了克隆的相关情况 1 thepurposeofthefirstparagraphisto a giveusanintroductiontoamovieb analysethepossibilityofcloningc giveanintroductiontothetextd tellustheimportanceofcloning答案 c从后文内容可知 第一段主要是为了引出下文 2 wecaninferfromthesecondparagraphthat a moreandmorepeopleareinterestedincloningb cloninghassavedmanyanimalsfromdyingoutc cloninghasaveryshorthistoryd cloningplantsismucheasier答案 d第二段说明 人们已经成功克隆了植物 而动物还不太成功 说明克隆植物要比克隆动物简单得多 3 inwhatwayishumancloninguseful a itcanbringadeadpersonbacktolife b itmakesitpossibletoreplaceadeadchild c itcanhelpcuresomehumandiseases d itcanhelppeoplehavemorehealthychildren 答案 b从最后一段可知 克隆人可以替代一个死了的孩子或者帮助不孕夫妻受孕 4 whatdoestheunderlinedword misgivings inthethirdparagraphmean a worries b aims c regulations d principles 答案 a从该词后的raisinganumberofmoralproblemsinvolved可知 克隆人引起了很多担忧 5 whatattitudedopeoplehavetowardshumancloning a theythinkhumancloningisuseless b theybelieveitcanhelphumansinma