人教課標(biāo)版高二選修8Unit2英語課件Cloning:Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Thinkabouthowtheydiffer.WarmingupDollythesheepIt’sthemostfamoussheepintheworld.DoyouknowhowDollyisdifferentfromothersheep?Shewasclonedwhiletheotherswerebornnaturally.Itisthecopyofanothersheep.man-madeclonesWhatcanyouseeinthepicture?Icanseeastrawberryplantproducingrunnersinanaturalformofcloning.naturalclonesWhocutthestemofftheplant?Agardener.Andthegardenerisgoingtoputitintoapottoproduceanotherplant.Heisactuallymakingacopyoftheplant.man-madeclonesWhatdoyouknowabouttwins?Therearetwinsofthesamesexandthoseofdifferentsexes.Thetwinshereareidenticalinsexandappearanceandaregoodexamplesofnaturalclones.Theycarrythesamegeneticinformation.Thefertilizedegghassplitintotwowhileinsidethemother,andsoproducedtwoidenticalhumanbabies.naturalclonesArethefollowingclonesthesame?Ifnot,whatisthedifference?NO.Thefirsttwoareman-madeclones.Theresttwoarenaturalclones.Pre-readingQuestionsaboutcloning:1.Whatisaclone?Acloneisananimalorplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced?Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning?1)Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdisease帕金森癥orAlzheimer’sdisease老年癡呆癥).2)Itcanhelpinfertilepeoplehavebabies.4.Whatproblemsmayarisewhenhumansarecloned?1)Peoplemaywanttoclonethemselvessotheycanliveforever.2)Peoplemaywanttoclonedeadchildren.3)Peoplemaywanttoclonetheirfavoritepets.ComprehendingI.Readthroughthepassageandfindthemainideaofeachparagraph.Cloningisawayofmakinganexactcopyofanotheranimalandplant.Cloninghastwomajoruses.ThebirthanddeathofDolly.TheeffectofDolly.Itisforbiddentoclonehumanbeings.Para1.Para2.Para3.Para4.Para5.II.Readthetextcarefullyandfillintheblanks.DefinitionCloningisawayofmaking____________ofanotheranimalandplant.Majorusesofcloning●Gardenersuseitto______commercialquantitiesofplants.●Itisvaluableforresearchonnewplantspeciesandfor_______researchonanimals.anexactcopyproducemedicalAboutDollythesheep◆Encouragingnews:Dollyseemedtodevelop________.◆Disturbingnews:Dollylivedonlysixandahalfyears,halfthelengthofthelifeofthe_______sheep,becauseofseriousillnesseswhichweremoreappropriatetoa__________________.normallyoriginalmucholderanimalDifferentopinionsoncloning◆Evilleadershopedtoclone_________toattaintheirambitions.◆Religiousleadersraised_____questions.◆Somegovernments_______researchintohumancloningbutothercountrieslikeChinaandtheUK,continuedtoaccumulate_______oftheabundantmedicalaidthatcloningcouldprovide.themselvesmoralforbadeevidence1.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.III.Choosethebestanswerafterreadingthepassageagain.細枝末節(jié)2.________isusedintheprocedure forcloningDollythesheep. A.ThenucleusofSheepA B.ThesomaticcellofSheepA C.ThenucleusofSheepB D.TheembryoofSheepC3.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailed4.ThelambisthecloneofthecellfromsheepBbecause_____.A.itprovidestheeggcellB.itgivesbirthtothelambC.itprovidesthenucleusD.itisafemalesheep5.Dollythesheep_________________.A.lookedexactlylikethesheepthatprovidestheeggB.wastheexactcopyofthesheepthatprovidesthenucleusC.lookedlikethesheepthatgavebirthtoitD.hadthecharacteristicsofallthreesheep6.Itcanbeinferredfromthepassagethataclonedanimal___________.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallydiesearlierthantheoriginaloneD.isusuallyashealthyastheoriginalone7.Whichofthefollowingiswrong?A.Clonedpeoplewouldliveforever.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherrealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.8.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.12D.13推理判斷9.WhichofthefollowisNOTaproblemordangerofcloningmentionedinthetext?A.Evilleadersmaywanttoclonethemselves.B.Animalclonesmaydeveloptheillnessofolderanimalsandmaydieyoungerthanthedonoranimals.C.Therearemoralobjectionstocloninghumanbeings.D.Toomuchcloningmayleadtothedestructionofthebalanceofnature.10.Whichofthefollowingisnotanadvantageofcloning?Cloningcanbeusedformedicalpurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Famouspersonswhohavepassedawaycanbecloned.D.Cloningcanhelpkeepanimalsfrombecomingextinct.11.Inthesecondparagraph,theword“straightforward”means____. A.uncomplicatedB.honestC.frankD.difficult12.Fromthelastparagraphwecaninferthat____.A.cloningwillcometoanendbecauseoftheobjectionsB.clonedhumanbeingswillbeproducedinthenearfutureC.manycountrieswillusecloninginawisewayD.alltheresearchintohumanbeingswillbeforbiddenC13.Whatispeople’sfearabouthumancloning?Whichofthefollowingiswrong?A.ClonedHitlerswoulddoharmtotheworld.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherrealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.14.Whatcanweknowfromthetext?A.Twinsaretheresultofnaturalclones.B.Cloningwillbenefitallofus.C.Itismoredifficulttomakeanimalclonesthancommercialplantclones.D.Dollythesheepwasthefirstclonedanimalintheworld.C15.Thewriter’sreactiontowardscloningis____.A.PositiveB.NegativeC.neutral16.Whatisthewritingstyle?A.Expositive(說明性的)

B.DescriptiveC.Argumentative(議論性的)

D.Narrative1).Cloningmeansmakingacopyofananimaloraplant.2).Gardenerscanmakealotofmoneybycloningplants.3).Cloninganimalsisascomplicatedascloningplants.FTFIV.Writetheletter“T”ifthestatementistrue.Write“F”ifitisfalse.TT4).Dollythesheepwasthefirstsuccessfulcloneofamammal.5).Naturalcloneshappeninanimalsaswellasinplants.Lookatthesepictures,anddiscussthisquestionwithyourpartner.Iscloningpeopleagoodthingorabadthing?Discussion1.克隆技術(shù)現(xiàn)在還不成熟,克隆人可能有很多先天性生理缺陷。2.克隆人的身份難以認(rèn)定,他們與被克隆者之間的關(guān)系無法納入現(xiàn)有的倫理體系。反對克隆人3.克隆技術(shù)有可能被濫用,成為恐怖分子的工具。4.從生物多樣性上來說,大量基因結(jié)構(gòu)完全相同的克隆人,可能誘發(fā)新型疾病的廣泛傳播,對人類的生存不利。1.“不讓我們克隆人,就是不讓我們修正我們的錯誤,人類歷史難道能夠這樣構(gòu)造嗎？”—《紐約時報書評》2.“當(dāng)然應(yīng)該‘克隆’人,如果誰第一個掌握了這個技術(shù),他就是我真正的、也是唯一的競爭對手。”—比爾·蓋茨支持克隆人3.“克隆人絕對是科學(xué)上了不起的進步,克隆技術(shù)必將創(chuàng)造21世紀(jì)的輝煌?！薄槭±砉W(xué)院生命工程教授約翰·布洛克4.“人體商業(yè)化是人類經(jīng)濟活動中無與倫比的成就,毫無疑問,克隆技術(shù)的出現(xiàn)將為世人創(chuàng)造一個最為廣泛和深遠的市場。”—英國《經(jīng)濟學(xué)家》雜志。Discussion1.Whatdoyouthinkisthewriter’sviewinthisreadingpassage?2.What’syouropinionofcloning?Givereasons.Ithinkthewriterisimpartialbecausehe/shedoesnotstateanypersonalopiniona