高中英语Unit2 Cloning 知识点讲与练人教版选修8.docx
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高中英语Unit2 Cloning 知识点讲与练人教版选修8.docx
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高中英语Unit2Cloning知识点讲与练人教版选修8
Book8Unit2CloningWarmingupandPre-reading
Ⅰ.背景阅读
Cloningisthetechniqueofproducingageneticallyidenticalduplicateofanorganism.Acloneissaidtobealldescendantsderivedasexuallyfromasingleindividual,asbycuttings,bulbs,byfission,bymitosis,orbyparthenogenesisreproduction.Itsoundsverydifferentandcomplicatedtous.
Infact,inourdailylife,thishappensoften.Forexample,gardenerstakecuttingsfromgrowingplantstomakenewones.Youoftenseethatyourmotherpicksasmallbranchfromagrowingplanttomakeanewone.Ifshelikesthiskindofflowers,shecandocloning.Cloningalsohappensinanimalsorhumanbeingswhentwinsidenticalinsexandappearanceareproducedfromthesameoriginalegg.Thefactisthatcloningplantsisstraightforwardbutthecloningofanimalsismorecomplicated.
Thepossibilityofhumancloning,raisedwhenScottishscientistsatRoslinInstitutecreatedthemuch-celebratedsheep"Dolly",arousedworldwideinterestandconcernbecauseofitsscientificandethicalimplications.ShewasthefirstmammaltobeclonedfromadultDNAtakenfromanadultcell.Previously,animalshadonlybeenclonedusingembryocellswhichalreadyhavethepotentialtobecomeacompleteembryoinitsownright.ThebigbreakthroughwithDollywastomakeaclonefromanordinary,adultcell−inthiscasefromafemalegoat’sudder.
1.Fillintheblanksaccordingtothepassage.
1)Thedefinitionofcloning
Cloningisa________ofproducingageneticallyidenticalduplicateofananimaloraplant.Ithappensbothin______andin_______.Theycanbeclonedby_______orhumans.Theformeris_______clonewhilethelatterisman-madeclone.
2)HowdoesDollydifferfromothersheep?
Shewas______byhumanswhiletheotherswerebornnaturally.
So,Dollywasa______sheep.
2.Discussthefollowingquestions.
1).Canyouseeanycloninghappeninourdailylife?
2).Whatbenefitscanhumansgainfromcloning?
3).Whatproblemsmayarisewhenhumansarecloned?
4).Shouldwecloneahuman?
5).Couldcloningreplacesexasthemeansofcreatingnewhumanlife?
6).Couldaparentcloneachildwhoisdyingofaterminalillness?
Reading
I.Readingcomprehension:
1.Themainideaofthetextis____
A.animalcloningisveryvaluableandcanbenefittheworld.
B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.
C.animalcloningiswelldevelopedbecauseDollythesheepwasborn.
D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.
2.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatience
C.thescientistswererewardedandgotlotsofmoney
D.manyotherattemptstoclonemammalsfailed
3.Whatisthewriter’sattitudetowardcloninginthispassage?
A.Thewriterisagainstcloning.
B.Thewriterisinfavorofcloning.
C.Thewriterisneutraltowardscloning.
D.Thewriterisinagreementwithcloning.
4.Whichofthefollowingisnotanadvantageofcloning?
A.Cloningcanbeusedformedicalpurposes.
B.Largequantitiesoffoodcanbeproducedbycloning.
C.Cloningcanhelpkeepanimalsfrombecomingextinct.
D.Peoplecanclonethemselvesatwill.
5.Wecaninferfromthelastthreeparagraphsthat___.
A.ThenormaldevelopmentofDollyhadnoeffectonthecloningofotherspecies.
B.Dolly’sseriousdiseaseandfinaldeathdisturbedthewholeworld.
C.Dollysuccessfullyclonedanewlambwiththehelpofcloningscientists.
D.Therewereargumentsaboutanimalsaboutanimalcloningandconcernsaboutthefutureofcloning.
6.Whatisthewritingstyle?
A.Expositive(说明性的)B.Descriptive
C.Argumentative(议论性的)D.Narrative
II.Fastreading:
TrueorFalsequestions
1.Cloningmeansmakingacopyofananimaloraplant.
2.Gardenerscanmakealotofmoneybycloningplants.
3.Cloninganimalsisascomplicatedascloningplants.
4.Dollythesheepwasthefirstsuccessfulcloneofamammal.
5.Naturalcloneshappeninanimalsaswellasinplants.
III.Fillinthechartusingtheinformationfromthetext.Addonereasonofyourownineachcolumn.
Problemsordangersofcloning
Advantagesofcloning
Animalsmay_______
_____________ofolderanimals.
Medicalcloningcould_________________forseriousdegenerative(变质的)________inhumans.
Animalclonesmay______
_________thanthedonoranimals
Cloningplantscan______
_________ofsimilar_____________________.
________________maywanttoclonethemselves.
Cloningplantscanbe_______forresearchon_____________________.
Thereare__________________tocloninghumanbeings.
Cloningcanhelpsave____________________.
Ⅳ.Writing
用大约30个词概括课文的内容,然后根据以下要求写一篇文章。
内容:
1.人们对克隆的看法
2.你对克隆所持的观点。
要求:
词数:
120
题目自拟
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________LanguagePointsofReading1
1.differvi.不一致,不同,相异,不同意,意见相左
常见的搭配有:
AandBdifferin…
AdiffersfromB
sbdifferfrom/withsbon/about/over/uponsth
拓展:
differentadj.
differencen.差异,差别,分歧,争论,差额
bedifferentfrom与…不同
makenodifferencetosb.对没有影响
makeadifference起作用,产生影响
即时练习:
用介词from,with,on,about,upon或in填空。
(1)Wediffer_________him_________thatquestion.
(2)Thetwonationsdiffer______cultureandreligion.
(3)Theclimateherediffers___________thatoftheSouth.
2.undertakevt.实施,从事,着手做,承担,担任,许诺,保证,采取,答应
undertakesth承担某事
undertakeatask/project承担一个任务/项目
undertaketodosth许诺做某事/同意做某事
undertakethat…保证…
即时练习:
完成下列句子。
•Hewill_____________________________nextmonth(去旅行).
•He__________________________________________(承担了一项新任务).
•我愿意承接这项变革的责任。
•Ican_________________________forthechanges.
•他许诺当我们的向导.
•He___________________________ourguide.
3.disturbvt.扰乱,使不安,弄乱
disturbedadj.被乱的,动乱的,不安的
disturbingadj.令人不安的/烦扰
即时练习:
用disturb,disturbing,disturbed填空。
(1)I’mvery__________aboutAlice.
(2)Don’t_________thepapersonmydesk.
(3)Thiscountryisina____________state.
(4)What____________newsitis!
(5)Alightwind___________thesurfaceofthewater.
4.castdown:
feelingunhappyanddepressed使沮丧,低沉,使下降,推翻
becastdown=feeldiscouraged
实验失败使得他很沮丧。
Hewasmuchcastdownbythefailureoftheexperiment.
不要沮丧。
继续保持你的精神。
Don’tbesocastdown.Justkeepupyourspirits.
即时练习:
将下列句子译成英语
(1)听到这个消息他很沮丧。
________________________________________________________________
(2)发现事情的真相使他很沮丧。
________________________________________________________________
拓展:
•castaway丢弃,抛弃,使失事,使漂流
•castoff放弃;丢弃,摆脱
•castout赶走,驱逐
5.AltogetherDollylivedforsixyears,…
altogetheradv.
①全部,总共
•这个中心区在这次飓风中失去了1000多棵树。
•__________________________________________________________
②总而言之
•总之,我们的成就是巨大的。
•__________________________________________________________
③完全地(completely)
•他并不完全确信接下去做什么。
•__________________________________________________________
区别:
alltogether与altogether
①作“总共”解时,它们可以互换使用。
•Therewerealtogether/alltogether42studentsintheclass.
我们班总共有42个学生。
②alltogether作“一道,一起”解时,不能用altogether替换。
•Theycamealltogether.他们一起来。
③altogether意为“完全地,彻底地,总之,总而言之”,不可与alltogether互换,用于否定句时是部分否定。
•It’saltogetheroutofthequestion.它完全不可能。
•Idon’taltogetheragreewithyou.我并不完全赞同你的看法
6.forbidvt.(forbade/forbad,forbidden,forbidding)禁止,不准,不许
forbidsth.
forbiddoingsth.
forbidsb.todosth.
forbidthat…
●Smokingshouldbeforbiddeninpublicplaces.公共场所应禁止吸烟。
●Iforbidyoutotellanyone.我不准你告诉任何人
●Thelawforbidsbuildingonthisland.法律禁止在这块土地上建筑。
即时练习:
完成下列句子
•
(1)Theschool_____________________________________________________(禁止学生吸烟).
•
(2)Heisforbidden__________________________________________(进入这个房间).
7.infavourof赞成;有利于(与against相对)
Isheinfavouroftheplan?
他赞成这项计划吗?
拓展:
insb’sfavor对某人有利
dosbafavor=doafavorforsb帮某人忙做
infavorwithsb.受某人支持
即时练习:
将下列句子译成英语
目前我没有得到大家的支持。
________________________________________________________________
今天你能帮个忙去学校接迈克吗?
____________________________________________________________
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