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1、 Cloning Unit2 牵手课堂 Scientistshaveusedcloningtechnologytotransformhumanskincellsintoembryonicstemcells anexperimentthatmayrevivethecontroversyoverhumancloning SincethebirthofDollythesheepin1996 researchershaveclonedabout20differentspecies includingrabbits goats cowsandcats Yettheysofarhavebeenunable
2、tocreatebiologicallyidenticalcopiesofanymonkeyorprimate includinghumans possiblybecausetheirreproductivebiologyismorecomplicated Buttherefinements 改良品 describedinthelatestexperimentsuggestthatit samatteroftimebeforetheyproduceaclonedmonkey saidJoseCibelli acloningexpertatMichiganStateUniversity whow
3、asn tinvolvedinthestudy Italsomeans headded thattheyareonestepclosertowheretheefficiencyishighenoughthatsomeoneiswillingtotrytocloneaperson thoughthatremainsadistantanddisturbingprospect Theresearchersweren tsimplytryingtoreachacloningmilestone Instead theywerelookingforabetterwaytomakefreshhumantis
4、sueforthetreatmentofsevereinjuriesordisease Lab growntissuehasthepotentialtotransformmedicine thoughitisstillalongwayfromroutineclinicaluse Forexample freshnervecellscouldalleviatespinalcordinjuries ornewly madeheartcellscouldrepairasitescarredbyaheartattack Section WarmingUpandReading 栏目导航 Readthet
5、extandmatchthemainideawitheachparagraph Para1 A Dolly sproblemanddeath Para2 B Whatiscloning Para3 C Twomajorusesofcloning Para4 D ArgumentsbroughtbyDolly Para5 E TheeffectofDolly B C A E D Scanthetextandchoosethebestansweraccordingtothetext 1 Themainideaofthetextis A animalcloningisveryvaluableandc
6、anbenefittheworldB animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC animalcloningiswelldevelopedbecauseDollythesheepwasbornD animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture答案 D 2 Thelambisthecloneofthecellfromsheepbecause A itprovidestheeggcellB itgivesbirthtothelambC itp
7、rovidesthenucleusD itisafemalesheep答案 C3 Itcanbelearntfromthepassagethataclonedanimal A usuallylivesaslongastheoriginaloneB usuallyliveslongerthantheoriginaloneC usuallydiesearlierthantheoriginaloneD isusuallyashealthyastheoriginalone答案 C 4 WhichofthefollowingisNOTaproblemordangerofcloningmentionedi
8、nthetext A Evilleadersmaywanttoclonethemselves B Animalclonesmaydeveloptheillnessofolderanimalsandmaydieyoungerthanthedonoranimals C Therearemoralobjectionstocloninghumanbeings D Toomuchcloningmayleadtothedestructionofthebalanceofnature 答案 D 5 Whataboutthewriter sattitudetowardcloninginthispassage A
9、 Thewriterisagainstcloning B Thewriterisinfavorofcloning C Thewriterdoesnotstateanypersonalopinionaboutcloning D Thewriterisinagreementwithcloning 答案 C Completethefollowingpassagewiththewordsinbracketsintheirproperformsorthewordsfromthetext Cloningisawayofmakingan1 exactly copyofanotheranimalorplant
10、 Cloninghastwomajoruses Itisusedtoproducecommericialquantitiesofplants Itisusedfor2 medicine researchonanimalsaswell Cloningplantsisstraightforward3 cloninganimalsisverycomplicated Itisadifficulttask4 undertake Manyattemptstoclonemammalsfailed Butatlastthedeterminationandpatienceofthescientistspaid5
11、 in1996withabreakthrough thecloningofDollythesheep exact medical while toundertake off Dolly sappearanceraisedastormof6 object andhadagreatimpact7 themediaandpublic8 imagine AltogetherDollylivedsixandahalfyears halfthelengthofthelifeofthe9 origin sheep Atpresentsomecountriesbegantoreformtheirlegalsy
12、stemsandforbaderesearchintohumancloning 10 othercountrieslikeChinaandtheUK continuedtoaccumulateevidenceoftheabundantmedicalaidthatcloningcouldprovide objections on imagination original but Point differvi 不同 相异 意见相左 考点一单词点击 AdiffersfromBin A与B在 方面不同AdifferswithBabout on over A与B就 意见相左 Thinkabouthowt
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14、o 对 有 有些 没有作用或影响 2 differentadj 不同的bedifferentfrom in 在 方面与 不同 3 differentlyadv 不同地 Whethershewilljoininthebirthdaypartymakesnodifferencetome 她是否参加生日晚会对我来说没有影响 Hishousediffers isdifferentfrommineincolour 他的房子与我的房子在颜色上不同 单句改错 1 Thetwinsistersdifferonly thatoneisabitfatterthantheotherone 解析 句意 这对双胞胎姐妹
15、的区别 仅仅在于其中一个比另一个稍胖一点 differ为不及物动词 意为 不同 相异 意见相左 如果表示 在 方面有 不同 时 其后应跟介词in in 2 Amaster sdegreedoesmake greatdifferencetoastudentwhowantstogetajob 解析 句意 对一个想找工作的学生来说 有没有硕士学位的确有很大影响 makeadifferenceto对 有作用或影响 在这个结构里 difference是不可数名词 不可用makedifferencesto 但当其前有形容词修饰时 是抽象名词具体化 形容词前要加不定冠词 a Point undertakev
16、t undertook undertaken 着手 从事 承担 Itisadifficulttasktoundertake 教材P11 这是一项很难完成的任务 undertakesth 着手 从事 承担某事undertakeresponsibility atask aproject承担责任 任务 工程undertaketodosth 承诺 答应做某事undertakethat 承诺 Wemustactasquicklyaspossiblenow Justtelluswhetheryoucanundertakethetaskornot 现在我们必须尽快采取行动 你就告诉我们你能否承担这项任务吧 Icanundertaketheresponsibilityforthechanges 我愿意承担这些变革的责任 HeundertooktofinishthejobbyFriday 他答应星期五之前完成这项工作 Ican tundertakethatyouwillwinthegame 我不能保证你在比赛中获胜 单句语法填空 1 I dliketolethimknowthattheeditingta
