2019届一轮复习人教版选修八Unit2Cloning-课件(58张)

返回2019届一轮复习人教版选修八Topic4Cloning(Book8•Unit2)主课文晨读课文是最好的阅读，减免携带教材之苦CLONING：WHEREISITLEADINGUS?Cloninghasalwaysbeenwithusandisheretostay.Itisawayofmakinganexactcopyofanotheranimalorplant.Ithappensinplantswhengardenerstakecuttingsfromgrowingplantstomakenewones.Italsohappensinanimalswhentwinsidenticalinsexandappearanceareproducedfromthesameoriginalegg.Thefactis❶thatthesearebothexamplesofnaturalclones.❶that引导表语从句Cloninghastwomajoruses.Firstly,gardenersuseitallthetimetoproducecommercialquantitiesofplants.Secondly,itisvaluableforresearchonnewplantspeciesandformedicalresearchonanimals.❷Cloningplantsisstraightforwardwhilecloninganimalsisverycomplicated.Itisadifficulttasktoundertake.Manyattemptstoclonemammalsfailed.Butatlastthedeterminationandpatienceofthescientistspaidoffin1996withabreakthrough—thecloningofDollythesheep.Theprocedureworkslikethis：❷while“而，却”，表对比1FemalesheepAprovidesaneggcell.2Thenucleusisremovedfromtheeggcell.3Theeggcellisreadyforanewnucleus.4FemalesheepBprovidesasomaticcellfortheclone.Thenucleusofthiscellcontainsallthegenes❸neededtoproduceanewsheep.5Thenucleusistakenoutofthesomaticcell.6ThenucleusfromsheepBandtheeggcellfromsheepAarejoinedusingelectricity.7Thecelldividesandgrowsintoanembryo.❸过去分词短语作后置定语8TheembryoisputintofemalesheepC,whobecomesthecarrieroftheclone.9ThelambisthecloneofthedonatedcellfromSheepBwhichprovidedthenucleus.Ontheonehand,thewholescientificworldfollowedtheprogressofthefirstsuccessfulclone,Dollythesheep.Thefactthatsheseemedtodevelopnormallywasveryencouraging.❹ThencamethedisturbingnewsthatDollyhadbecomeseriouslyill.CloningscientistswerecastdowntofindthatDolly'sillnessesweremoreappropriatetoamucholderanimal.AltogetherDollylivedsix❹时间副词then引导完全倒装句；that从句为同位语从句andahalfyears,halfthelengthofthelifeoftheoriginalsheep.Sadlythesamearbitraryfateaffectedotherspecies,suchasclonedmice.Thequestionsthatconcernedallscientistswere:“Wouldthisbeamajordifficultyforallclonedanimals?Wouldithappenforever?Coulditbesolvedifcorrectionsweremadeintheirresearchprocedure？”Ontheotherhand,Dolly'sappearanceraisedastormofobjectionsandhadagreatimpactonthemediaandpublicimagination.Itbecamecontroversial.Itsuddenlyopenedeverybody'seyestothepossibilityofusingcloningtocureseriousillnessesandeventoproducehumanbeings.Althoughatpresenthumaneggcellsandembryosneededforcloningresearcharedifficulttoobtain,newspaperswroteofevilleaders❺hopingtoclonethemselvestoattaintheirambitions.Religiousleadersalsoraisedmoralquestions.Governmentsbecamenervousandmoreconservative.Somebegantoreformtheirlegalsystemsandforbaderesearchintohumancloning,butothercountrieslikeChinaandtheUK,continuedtoaccumulateevidenceoftheabundantmedicalaidthatcloningcouldprovide.However,scientistsstillwonderwhethercloningwillhelporharmusandwhereitisleadingus.❺现在分词短语作后置定语主干知识·全面查验——课前自主盘点·打牢语言基础高频考点·重点突破——精析重点难点·突破认知障碍融会贯通·增分高考——贯通课堂内外·实现学考对接话题语篇·集训过关——演练同类话题·练中探规寻律主干知识·全面查验——课前自主盘点·打牢语言基础[单词“分类记”]1．commercialadj.2．proceduren.3．arbitraryadj.4．moraladj.5．conservativeadj.6．regulationn.商业的；贸易的程序；步骤；手续任意的道德(上)的；伦理的保守的；守旧的规则；规章；法规(一)阅读障碍词汇(识其形·知其义)1．adj.简单的；直接的；坦率的2．n.突破3．vt.获得；赢得4．vt.获得；到达(水平、年龄、状况等)5．vt.欠(账、钱、人情等)；归功于……6．vt.打扰vi.操心n.烦扰7．adj.虚荣的；自负的；徒劳的straightforwardbreakthroughobtainattainowebothervain(二)高考高频词汇(知其义·写其形)8．vt.抵抗；对抗9．vt.着手；从事；承担10．vt.扔；投；掷11．vt.禁止；不准12．vt.&vi.打；撞击；罢工n.罢工13．adj.合情理的；讲道理的；公道的14．adj.精确的；准确的resistundertakecastforbidstrikereasonableexactⅠ.根据词性和词义写出下列单词1．differvi.不同；相异→adj.不同的；与众不同的→n．差异；不同2．objectvi.反对；不赞成→n．不赞成；反对；异议3．accumulatevt.&vi.积累；聚积→n．积累4．retirevi.退休；离开→n．退休5．assumptionn．假定；设想→vt.假定；设想differentdifferenceobjectionaccumulationretirementassume(三)活学活用词汇(记得清·用得活)Ⅱ.用所给词的适当形式填空1．Hefromthepostasamanager.Afterhis,hesettleddowninaremotevillage.(retire)2．Fromtheappearance,wecannottellthebetweenthetwins,thoughtheyalwayshavesomeideas.(differ)3．Greydecidedtomovetothecountrysideandhismothermadenotoit,whilehisfathertoit.(object)4．Don'tthatyouareaprincessandstoplivinginanymore.(assume)retiredretirementdifferencesdifferentobjectionobjectedassumeassumption[短语“语境记”]1．得到好结果；取得成功；偿清2．使失望；使沮丧；不愉快3．反对4．赞成；支持5．一定或注定(做)……6．使……刻骨铭心7．不时；偶尔8．使复生；使复活9．白费力气；枉费心机10．状况很好(坏)；情况很好(坏)(一)根据汉语写出下列短语payoffcastdownobjecttoinfavourof(be)boundto(do)...strike...intoone'sheartfromtimetotimebringbacktolifeinvainingood/poorcondition(二)选用上述短语填空1．Theathlete'syearsofhardtrainingwhenshefinallywontheOlympicgoldmedal.2．Keeponworkinghardlikethis,andyourresearchobtaingreatsuccess.3．Thehouseisreally—itwouldcostfartoomuchtorepair.4．Inmakingscientificexperiments,weshouldnotbebytemporarysetbacks.paidoffisboundtoinpoorconditioncastdown5．Hisparentstriedtopersuadehimnottogiveuphiswell­paidjob,buttheireffortswere.6．Inancienttimes,peoplebelievedthattheycouldbeafterdeath.7．JackwantedtobeinformedhowJanewasgettingalong.8．MountainTaiitsbeautyandshedecidedtovisititagainthenextyear.invainbroughtbacktolifefromtimetotimestruckintoherheart[句式“仿写通”]1．ThencamethedisturbingnewsthatDollyhadbecomeseriouslyill.接着传来了多莉病重的坏消息。[解读]then位于句首，句子用全部倒装语序。that引导同位语从句。[仿写]接着传来了屠呦呦，一位中国女科学家，获得诺贝尔奖的令人兴奋的消息。TuYouyou,aChinese