高中英语 27(Unit2 warming-up)课件 新人教版选修8 课件VIP免费

新课标人教版课件系列《高中英语》选修(模块）8-2.7Unit2CloningwarmingupandspeakingDoyouenjoywatchingTVseries?HaveyoueverseenJourneyToTheWest?Whatisclone?Clone,alsocalledreproduceasexually(无性生殖/繁殖),isthecreationofcellsorwholeanimalsusingDNAfromasingle“parent”,withoutusingthenormalreproductive(有性生殖)process.TheclonehasthesameDNAtotheparent.cloneNaturalcloneMan-madecloneNaturalcloneisonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.Man-madecloneisonethatproducedthroughhumanintervention(介入).cactusstrawberrytwinspendulumorchid(吊兰)naturalcloningexamplesMan-madecloningexamplestheimportanteventsincloninghistoryIn5000B.C.(谷物选种)HumanBeingsbegantochoosethebestseedsfromsomekindsofcrops.Thatwasthebeginningofcontrollinglifeaccordingtohuman’swill.In1952:Cloningtadpole(克隆蝌蚪)TheAmericanscientistscreatedacopyoftadpolebymeansofusingatadpolecell.Thistinytadpolehasbecomethefirstkindofcloninganimal.•In1978:Thefirstcaseoftubeinfant(试管婴儿)appeared.☆ABritishdoctorusedthesperm（精液）ofamanandfertilized(受精)itinatesttube(试管).☆Thentransplanted(移植)theembryo(胚胎)intothewomb(子宫)ofahealthymother.☆ThefirsttubeinfantcalledLouisappeared.In1996,thefamoussheep“Dolley”wasclonedsuccessfullyDolleyandtheFatherofDolley–Lanwilmut(伊恩.威尔姆)•In1998Aseriesofthingswerecloned.•ThescientistsinHawaiiUniversityclonedover50mice.•Someprivateinstitutions(协会)successfullyclonedlittleoxen.In2002,thescientistsofA&MUniversityinUSAhasbredthefirstclonedcatintheworld.Nowadays:☆Cloneddog,mouse,rabbit,goat,ox,pigappeared.☆Chinabecometheseventhcountrythathastheabilitytoclonepigs.☆Chinahassucceededinusingembryonic（胚胎的）celltoclonemanyanimals.QuizNaturalcloneMan-madeclonestrawberry★★Isitnaturalcloneorman-madeclone?identicaldogsNaturalcloneMan-made★cactus★twinsTorFquestions1Clonecanbefrombothnaturalcloneandman-madeclone.2Thesheep,namedKittywasthefirstsuccessfulcloneofamammal(哺乳动物).TF3Onlystrawberriesandcactus(仙人掌)arenaturalclones.F4SinceDolley,researcherhaveclonedanumberoflargeandsmallanimalsincludinggoats,cows,mice,pigs,cats,rabbitsanddogs.5Aparentcancloneachildwhoisdyingofaterminalillness(不治之症).TFEnjoyoneplayBackground:Amanhaslosthislefthand,onedayhisfriendtellshimthenewsthatadoctorcantransplantonenewhandforhim...Theplayhappenslikethis…Guessing:Whatwillthedoctorsayattheendoftheplay?Iscloninggoodorbadforus?AdvantagesDisadvantagesGroup1and2Group3and4Mini-DebateAreyouinterestedinthetopicofcloning?Doyoubelievethatwewillhaveclonedhumansoon?Doyouthinkaclonedhumanshouldhavehumanrights?Doyousupportmedicalcloning?SpeakingInterviewaboutcloningSituation:AreporterfromChinaDailyisinterviewingthreefamousscientistsabouttheiropinionsofcloning.Doyouthinkitiswise…?What’syouropinionof…?Ithinkyoushould…Iagreewithyouthat…Iwouldneveraccept…PleasepreviewreadingcomprehensionandgetsomeinformationaboutDolleyHomework