公开课 Unit2 Cloning.ppt

Reading Cloning WhereisitLeadingus Inpairs lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman made Explainhowtheydiffer Discussion 一株草莓依靠它沿地 爬走 的匍匐茎 一年内就能长出数百株草莓苗 Naturalclone Twins Theyarebornnaturallyandidenticalinsexandappearance Naturalclone Dolly是世界上第一例用体细胞 乳腺上皮细胞 通过细胞核移植技术 在复杂的人工操作下 得到的一只小绵羊 Whatisaclone Howisacloneproduced Reading PleaseListentothetapeandgetthemainidea andthenfinishthefollowingexercisesingroups Themainideaofthetextis A animalcloningisveryvaluableandcanbenefittheworld B animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC animalcloningiswelldevelopedbecauseDollythesheepwasborn D animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture 主旨大意 2 WhichofthefollowingstatementsaboutcloningisNOTtrueaccordingtotext A Cloningissomethingthathasbeendevelopedquiterecently B Twinsthatlookexactlythesameareoriginallyfromthesameegg C Cloningisusedbygardenerstomakemoremoney D Animalcloningismuchmoredifficultthanplantcloning 细枝末节 A 3 ThecloningofDollythesheepsucceededbecause A itseasiertocloneasheepthanotheranimalsB thescientistsweredeterminedandworkedhardwithpatienceC thescientistswererewardedandgotlotsofmoneyD manyotherattemptstoclonemammalsfailed B 4 Thesheepthatdonatedthesomaticcellmostprobablylived years A 3B 6C 9D 12 推理判断 5 DollythesheepA lookedexactlylikethesheepthatprovidestheeggB wastheexactcopyofthesheepthatprovidesthenucleusC lookedlikethesheepthatgavebirthtoitD hadthecharacteristicsofallthreesheep 6 Whataboutthewriter sattitudetowardcloninginthispassage A Objective befair B Negative beagainstit C Positive beinfavorofit theauthordoesnotstateanypersonalopinionaboutcloning Because 观点态度 Mainideas Readthepassageandfindoutthemainideaofeachparagraph Para 1ThedefinitionofcloningPara 2ThemajorusesandproceduresofcloningPara 3TheproblemsofDollyPara 4TheeffectofDollyPara 5People sreactiontocloning 多利 的诞生标志着克隆研究取得新的进展和重大突破 而且这个结果证明 动物体中执行特殊功能 具有特定形态的所谓高度分化的细胞与受精卵一样具有发育成完整个体的潜在能力 也就是说 动物细胞与植物细胞一样 也具有全能性 多利 的诞生有什么重大的意义和影响 1996cloningsheeps 2001cloningcattle 2002年4月16日美国第一头克隆牛 艾米 产下牛犊喜作妈咪 我国成功繁殖克隆兔体形要比普通兔大许多 2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔 2002cloningcats 第一只克隆宠物猫 克隆马及其 母亲兼姐姐 2005cloning