




版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
2022-2023年浙江省丽水市大学英语6级大学英语六级学校:________班级:________姓名:________考号:________
一、2.ReadingComprehension(SkimmingandScanning)(20题)1.
CuttingbudgetforscienceresearchanddevelopmentfurthersmothersincentivesforAmericanstudentsto______.
2.
InsomeEasterncountries,face-to-facemeetingsarefavoredtoworkthroughtheconflicts.
A.YB.NC.NG
3.
Awebsiteisachannelthroughwhichcompaniescanpromotetheirproductsandcompete______.
4.Canadahadtototallybanfishingineastcoastwatersintheyearof______.
A.1975B.1980C.1990D.1992
5.
HenrikChristensenismostconcernedaboutwhetherrobotsare______.
A.harmlessB.powerfulC.intelligentD.durable
6.
Thefinaljudgmentwasthateveryoneinvolvedshouldgetathirdofthefish.
A.YB.NC.NG
7.
Doctorswhotreatdepressionwilldistinguishmajordepressionanddysthymiaandtreatthemdifferently.
A.YB.NC.NG
8.
Hightea,thetypicalmealinScotlandandmanypartsofnorthernEngland,istaken______.
A.lateintheevening
B.asthesubstituteforteaandlunch
C.ataboutsixo'clockintheevening
D.onlybythetourists
9.Thepropertemperatureforstoringbooksis______.
10.WhatdoesthechairmanofVodafoneJohnBondthinkofbanks?
A.Theycanhardlygetprofitoutofsmallpayments.
B.Theymaydisappearinthenearfuturejustlikecash.
C.TheyhavegreatlychangedvillagelifeinAfrica.
D.Theyholdaprimaryroleinthemoney-transferbusiness.
11.
Thefirstuseoftheterm"organicfarming"isusuallycreditedto______inhis1940book,LooktotheLand.
12.PartⅡReadingComprehension(SkimmingandScanning)
Directions:Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,choosethebestanswerfromthefourchoicesmarked[A],[B],[C]and[D].Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.
7HealthProblemsfortheModernAge
Modernlife,withitsemphasisoninformation,automation,computerization,andglobalization,hasmadeworkeasierandgivenusmoreleisureoptions,butwenowhaveawholehostofnewhealthproblems.Onlytimewilltellifthesemodernhealthproblemsdisappearlike8-tracktapesandrotaryphones.Untilthen,herearesomeofthenewmaladieswehaveinstoreforus.
ComputerVisionSyndrome
Ifyouspendalldaystaringatacomputerscreen,youmaybeatriskforcomputervisionsyndrome(CVS),alsocalledoccupationalasthenopia(弱视的).CVSencompassesalleyeorvision-relatedproblemssufferedbypeoplewhospendalotoftimeoncomputers.AccordingtotheAmericanOptometricAssociation,symptomsofCVSincludeheadaches;dry,red,orburningeyes;blurredordoublevision;troublefocusing;difficultydistinguishingcolors;sensitivitytolight;endevenpainintheneckorback.Asmanyas75percentofcomputerusershavesymptomsofCVSduetoglare,poorlighting,andimproperworkstationsetup.ToovercomeCVS,keepyourmonitorabouttwofeetawayfromyouandsixinches.beloweyelevel,andbesureit'sdirectlyinfrontofyontominimizeeyemovement.Adjustlightingto,removeanyglareorreflections.Youcanalsoadjustthebrightnessonyourmonitortoeaseeyestrain.Evensimplestepscanhelp,likelookingawayfromyourmonitorevery20or30minutesandfocusingonsomethingfartheraway.Andyoucanalwaysuseeyedropstoperkupyourpeepers!
Earbud-relatedHearingLoss
Earbudsaretheheadphonesusedwithmanydigitalmusicplayers.Theyfitinsidetheearbutdon'tcanceloutbackgroundnoise,requiringuserstoturnupthevolume,oftento110to120decibels--loudenoughtocausehearinglossafteronlyanhourend15minutes.Andtoday,peoplespendmuchmoretimelisteningtotheirportableplayers,exposingthemselvestodamagingnoiseforlongerperiodsoftime.Asaresult,youngpeoplearedevelopingthetypeofheatinglossnormallyseeninmucholderadults.Expertsrecommendturningdownthevolumeandlimitingdieamountoftimespentlisteningtomusicplayerstoaboutanhouraday.Headphonesthatfitoutsidetheearcanalalsohelp,ascannoise-cancelingheadphonesthatreducebackgroundnoisesolistenersdon'thavetocrankupthevolume.
E-thrombosis
Thisconditionisrelatedtodeepveinthrombosis(血栓症),wherebloodclotsform.indeepveins,suchasthoseinthelegs.Theseclotscanbefataliftheymigratetothelungsandcauseapulmonaryembolism.Clotscanform.whenbloodsupplyslowsorstops,suchasinaperiodofprolongedimmobility.Similarly,e-thrombosisisthedevelopmentofclotsinthedeepveinsofsomeonewhospendslongamountsoftimeinfrontofacomputerwithoutmoving.Althoughonlyahandfulofe-thrombosiscaseshavebeenreported,millionsofpeoplewhospendmostoftheirtimeinfrontofacomputerareatrisk.Avoidinge-thrombosisissimple:standupandmovearoundeveryhour,tapyourtoeswhileyouwork,putequipmentendsuppliesindifferentpartsofyourworkareasoyouhavetomovetogetthem,don'tcrossyourlegswhilesittingatyourdesk,don'tspendyourlunchbreakatyourdesk(goforaquickwalkinstead),anddon'tgettoocomfortable--ifyourworkspaceisultra-cozy,youwon'twanttogetup.
GeneralizedAnxietyDisorder
Weallhaveworries,uncertaintie
A.dry,red,orburningeyesandblurredordoublevision
B.glare,poorlightingandimproperworkstationsetup
C.notkeepingtheirmonitortwofeetawayfromthem
D.notusingacomputerthatprotectstheireyes
13.CommonFaultsandEyeMovement
Thereareanumberofbadhabitswhichpoorreadersadopt.Mostoftheseinvolveusingextrabodymovementinthereadingprocess.Inefficientreading,themusclesoftheeyeshouldmaketheonlyexternalmovement.Ofcoursetheremustbevigorousmentalactivity,butextrabodymovements,suchaspointingwiththefingerormovingthelips,donothelpreadingandoftenslowitdown~
POINTINGATWORDS
Afaultthatisoftenseenwhenstudentsaretryingtoconcentrateispointingtothewordswithafinger,pencilorruler.Youngchildrenandverypoorreadersoftenpointwithafingerateachwordinmm.Slightlymorematurereaderssometimesholdapencilorrulerunderneaththelinewhichtheyarereading.Whilemarkingthelinemightbehelpfulforbeginningreaders,itiscertainlyunnecessaryfornormalreaders.Besidesslowingdownthereaderthrough-themeremechanicalmovementofpencil,ruler,orfinger,pointingatlinesorwordstendstocausethestudenttofocushisattentiononthewrongthing.Theimportantthingtoconcentrateonwhilereadingistheidea.thattheauthoristryingtocommunicate,andnotthelocationofthewordsonthepage.Theeyesofanychildoldenoughtolearnhowtoreadarecertainlyskillfulenoughtobeabletofollowalineofprintwithoutextrahelpfromfingersorrulers.
Anothercommonfaultthatiseasilyobservedisheadmovement.Thismostoftenoccurswhenstudentsarenervousabouttheirreadingortryinghard,asduringareadingspeedtest.Withheadmovementthestudenttriestoaimhisnoseatthewordheisreadingsothatashereadsacrossthelinehisheadturnsslightly.Whenhemakesthereturnsweeptobeginanewlinehisheadquicklyturnsbacksothathisnoseispointedattheleft-handmargin,andhecannowbegintoreadthenewlinebyslowlyturninghishead.Thebeliefthatthisheadmovementaidsreadingispurenonsense.Eyemusclesarequitecapableofshiftingtheeyesfromwordtoword,andtheyneednohelpfromneckmuscles.
Oftenstudentsarequiteunawarethattheyaremovingtheirheadswhilereadingandtheyneedtoberemindedbytheteachernottodoit.
VOCALIZATION
Vocalizationisanotherfault.Somepoorreadersthinkitnecessarytopronouncealoudeachwordasitisread.Usuallythispronunciationisquitesoft,sothatthestudentismorewhisperingtohimselfthanactuallyreadingaloud,buteventhisisveryundesirable.Thechiefdisadvantageofpronouncingwordswhileyoureadthemisthatittendstotiereadingspeedtospeakingspeed,andthesilentreadingofmostnormalreadersisnearlytwiceasfastastheirspeaking.Usuallythisfaultcanbeeliminatedinolderstudentsbytheirownconsciouseffort,possiblywiththeaidofafewremindersfromtheteacher.
Vocalizationbybeginningreadersisacommonfault;afterareaderreachessomematurityitbecomesveryundesirable.
Vocalizationtakesvariousmodifiedforms.Sometimesareaderwillmerelymovehislipssoundlessly.Atothertimeshemaymaketongueorthroatmovementswithoutlipmovement.Stirotherreaderswillhaveactivitygoingonintheirvocalcords,whichcanbedetectedbythestudentifheplaceshisfingersalongsidehisvocalcordsinthethroatwhileheisreading.Vocalcordvibrationcanbefeltwiththefingersquiteeasily.Liketruevocalization,theseminorpartsof"subvocalization"—lipmovement,tongueorthroatmovementandvocalcordmovement—canbestoppedbyconsciouseffortofthestudent.
SUBVOCALIZATION
Subvocalizationisthemostdifficultofalltypesofvocalization.Insubvocalizationthereisnobodymovement.Thelips,tongueorvocalcordsdonotmove.Butaninnertypeofspeechpersists:withinthestudent'smindheissayingeachwordtohimself,clearlyprono
A.YB.NC.NG
14.
Fromhisfindings,Hayhasestablishedsomeflexibleguidelinesforparentsofidenticaltwins.Onesuggestionisforparentsto______sothatcontactwithotherchildrenwill______acceleratelanguagedevelopment.
15.
Epiphytes,whichform.muchoftheunderstoryoftherainforest,getalltheirwaterandnutrientsfrom______.
16.
Besidesmakingbuildingsandworksofart,Mayasachievedgreataccomplishmentson______.
17.
There'slittleagreementonwhatintermarriagewillmeanforU.S.societyinthefutureasthereisalackofofficialnumbers,aheightenedtensionsurroundingracialissues,andthemutualsuspicionthatexistsamongdifferentracialgroups.
A.YB.NC.NG
18.
UserswithIADoftenfinditdifficulttogetalongintheirwork.
A.YB.NC.NG
19.
Wilcox'sfatherhadoccasionallysoldtherelicsfoundinhislandsince19
A.YB.NC.NG
20.
TheKyotoProtocolrequires____--tocurbGHGemissions,especiallyCO
二、3.ListeningComprehension(20题)21.(26)
A.Theyusuallyacceptresponsibility.
B.Theyblamefactorsbeyondtheircontrol.
C.Theycomplainabouttheirpersonalproblems.
D.Theycomparetheirbehavior.toothers.
22.(36)
A.Indifferent.B.Surprised.C.Worried.D.Confident.
23.(32)
A.Theycompetewitheachother.
B.Theydogoodtoeachother~
C.Theyfocusondifferentnews.
D.Theywilldieout.
24.(29)
A.Rapidpopulationgrowth.
B.Corruptcitygovernment.
C.Realestatespeculators.
D.Lackofimmigrationquotas.
25.听力原文:Scientistssaysharkshavelivedintheworld'soceansformillionsofyears.Scientistssaytherearemorethanthree-hundred–fiftydifferentkindsofsharks.
Sharksdonothavebones,andasharkhasanextremelygoodsenseofsmell.Itcanfindsmallamountsofsubstancesinthewater,suchasblood,bodyliquidsandchemicalsproducedbyanimals.Sharksalsosenseelectricalandmagneticpowerlinkedtonervesandmusclesoflivinganimals.Thesepowerfulsenseshelpthemfindtheirfood.Somesharkswilleatjustaboutanything.Manyunusualthingshavebeenfoundinthestomachsofsometigersharks.Theyincludeshoes,dogs,acow'sfootandmetalprotectiveclothing.
Aboutfortypercentofthedifferentkindsofsharkslayeggs.Theothersgivebirthtoliveyoung.Somesharkscarrytheiryounginsidetheirbodieslikehumansdo.
Scientistsarebeginningtounderstandtheimportanceofsharkstohumans.Medicalresearcherswanttolearnmoreabouttheshark'sbodydefensesystemagainstdisease.Theyknowthatsharksrecoverquicklyfrominjuries.Sharksappearnevertosufferinfections,cancerorheartdiseases.
(33)
A.Callonpeopletoprotectsharks.
B.Pointoutthelivingenvironmentofsharks.
C.Explainwhythesharksaredangerous.
D.Anintroductiontosharks.
26.(18)
A.Thewomanlikesarguing.
B.Thewomanshouldgetajob.
C.Thewomanshouldworkinafactory.
D.Thewomanspendstoomuchmoney.
27.(31)
A.Bysendingwaterdirectlybacktotheseawithgreatforce.
B.Byreducingwaveenergy.
C.Byreducingbeachwidth.
D.Bystabilizingbeachfrontconstruction.
28.(24)
A.It'sfartooexpensive.
B.TheservicebetweenLondonandAberdeenisn'tfrequent.
C.Shethinksit'sdangerous.
D.Forsomereasonshedoesn'tlikeflying.
29.
【B3】
30.
【B2】
31.SectionC
Directions:Inthissection,youwillhearapassagethreetimes.Whenthepassageisreadforthefirsttime,youshouldlistencarefullyforitsgeneralidea.Whenthepassageisreadforthesecondtime,youarerequiredtofillintheblanksnumberedfrom36to43withtheexactwordsyouhavejustheard.Forblanksnumberedfrom44to46youarerequiredtofillinthemissinginformation.Fortheseblanks,youcaneitherusetheexactwordsyouhavejustheardorwritedownthe
Alotofpeoplethinkthatsittingis【B1】______ontheirbacksthanstandingorlifting.Nottrue.Peoplewhosejobsrequirethemtositforlongperiodsoftime【B2】______asmuchfrombackpainaspeoplewholiftalldaylong.Manyworld-classresearchersbelievethatthehuge【B3】______inbackpainoverthepastcoupleof【B4】______—anditishuge--hasalottodowiththefactthatmoreandmoreofusarespendingourworkdaysinchairs.Manypeoplehavethe【B5】______that,iftheirbackpaingetsbadenough,theycanalwaysresortto【B6】______.Nothingcouldbefurtherfromthetruth.Theamountofpainsomeoneisinhasverylittletodowithwhetherornotheorshecould【B7】______fromsurgery.OneBritishresearcherhas【B8】______thatforevery10,000peoplewhoexperienceaboutbackpain,onlyfourneedsurgery.【B9】______.Nolonger.Twoorthreedaysofbed-restisnowthenorm.Afterthat,peopleareadvisedtoreturntotheirnormalactivities,graduallyifnecessary.Thereasonsforthe180°shiftarewhat'sinteresting.Foropeners,【B10】______.Inournextlecture,weshalllookattherelationbetweendepressionandchronicbackpain.【B11】______.
【B1】
32.听力原文:Therearemanyfamousmuseumsthroughouttheworldwherepeoplecanenjoyart.WashingtonD.C.hastheNationalGalleryofArt;ParishastheLouvre.FloridaInternationalUniversityinMiamialsodisplaysartforpeopletosee.Anditdoessowithoutabuilding,orevenawallforitsdrawingsandpaintings.
FloridaInternationalUniversityhasopenedwhatitsaysthefirstcomputerartmuseumintheUnitedStates.Youdon'thavetovisittheuniversitytoseetheart.Youjustneedacomputerlinkedtoatelephone.
Youcallthetelephonenumberofauniversitycomputerandconnectyourowncomputertoit.Alloftheartisstoredintheschoolcomputer.Itiscomputerart,createdelectronicallybyartistsontheirowncomputers.Inonlyafewminutes,yourcomputercanreceiveandcopyallthepicturesanddrawings.
RobertShostakisdirectorofthenewcomputermuseum.Hesayshestartedthemuseumbecausecomputerartistshadnoplacetoshowtheirwork.
Acomputerartistcouldonlyrecordhispictureselectronicallyandsendtherecords,ordiscs,tootherstoseeontheircomputers.Hecouldalsoputhispicturesonpaper.Buttoprintgoodpicturesonpaper,thecomputerartistneededanexpensivelaserprinter.
RobertShostaksaystheelectronicmuseumismostlyforartorcomputerstudentsatschoolsanduniversities.Mostofthepicturesinthemuseumaremadebystudents.MisterShostaksaystheFloridaInternationalUniversitymuseumwillmakecomputerartmorefunforcomputerartistsbecausemorepeoplecanseeit.Hesaysartistsenjoytheirworkmuchmoreiftheycanhaveanaudience.AndthegreatnumberofhomecomputersinAmericacouldmeanahugeaudiencefortheelectronicmuseum.
(33)
A.InParis.B.InLondon.C.InMiami.D.InWashingtonD.C.
33.(22)
A.Residentstherecan'tgohomedirectlybybus.
B.Thehousesaretooexpensivetoafford.
C.Peopletherearesomehowunreasonable.
D.It'stooremotetosendforacabthere.
34.(43)
35.
【B7】
36.(23)
A.Professorandstudent.
B.Classmates.
C.Customerandshopassistant.
D.Colleagues.
37.听力原文:M:IwassurprisedtoseeEdinthejobcentertoday.Doyouthinkhe'sunhappyoveradmissions?He'saboutthebestworkertheyhaveoverthere.
W:Iknow,butIhearthathisboss'sneversaidathingtohimtoacknowledgethat.Andhowwouldyoufeelifyou'dbeentherefiveyearsandstillhadthesamesalary?
Q:WhatdoesthewomanimplyaboutEd'sformerboss?
(19)
A.Thebosswasveryconsideratetohisworkers.
B.Edwasn'tasgoodaworkerasthebossthought.
C.ThebosshadplannedtogiveEdaraiseinsalary.
D.Thebosshasneverconsideredraisingtheworkerssalary.
38.听力原文:In1789theU.S.governmentpassedalawwhichsaidthatthelandoftheAmericanIndianscouldneverbetakenfromthemwithouttheiragreement.Onehundredyearslater,however,theIndiansonlyhadaverysmallpartofthelandthatoriginallybelongedtothem.Howdidthisgreatinjusticeoccur?
After1812,whitesettlersbegantomovewestacrossNorthAmerica.Atfirst,thesettlersandtheIndianslivedinpeace.However,thenumberofsettlersincreasedgreatlyeveryyear,(32)andslowlytheIndiansbegantoseethewhitesettlersasadangertotheirsurvival.Tofeedthemselves,thesettlerskilledmoreandmorewildanimals.TheIndians,whodependedontheseanimalsforfood,(33)hadtostruggleagainststarvation.TheSettleralsobroughtwiththemmanydiseaseswhichwerecommoninwhitesociety,butwhichwerenewfortheIndians.GreatnumbersofIndiansbecamesickanddied.Between1843and1854theIndianpopulationinoneareaofthecountrywentdownfrom100000to30000.
MorelandwasneededfortheIncreasingnumberofwhitesettlers.InWashington,theoldrespectfortherightsoftheIndiansdisappeared.TheoldpromisestotheIndianswerebroken,thefederalgovernmentbegantomovegroupsofIndiansfromtheiroriginalhomelandstootherpoorerpartsofthecountry.(34)SomeIndiansreactedangrilyandviolentlytothistreatment.Theybegantoattackwhitesettlers.AndtheIndianWarsbegan.Forthirtyyears,untilthelate1880s,differentgroupsofIndiansfoughtagainsttheinjusticesofthewhiteman.ManyIndianswerekilled,thesurvivorsweremovedfromtheirhomelandstodifferentareasofthecountry.(35)Itwasaterriblechapterinthehistoryofacountrythatpromisedfreedomandequalitytoeveryone.
(33)
A.Whenthewhitesettlersbegantomovewestin1812.
B.Whentheincreasingwhitesettlersbegantokillwildanimals.
C.WhenmanyIndiansbegantodiefromthediseases.
D.Whenthewhitesettlerswantedtooccupytheland.
39.听力原文:25yearsago,RayAnderson,asingleparentwithaoneyear-oldsonwitnessedaterribleaccidentwhichtookplacewhenthedriverofatruckranaredlightandcollidedwiththecarofSandraJankins.TheimpactofthecollisionkilledSandrainstantly.Butherthree-month-olddaughterwaslefttrappedintheburningcar.Whileotherslookedoninhorror,Andersonjumpedoutofhisvehicleandcrawledintothecarthroughtheshadowedmarwindowtotrytofreetheinfant.Secondslater,thecarwasenclosedinflames.Buttoeveryone'samazement,Andersonwasabletopullthebabytosafety.Whilethebabywasallright,Andersonwasseriouslyinjured.Twodayslaterhedied.Buthisheroicactwaspublishedwidelyinthemedia.Hissonwassoonadoptedbyrelatives.Themostremarkablepartofthestoryunfoldedonlylastweek.KarenandherboyfriendMichaelwerelookingthroughsomeoldboxeswhentheycameacrosssomeoldnewspaperclippings."ThisismewhenIwasanewbornbaby.Iwasrescuedfromaburningear.Butmymotherdiedintheaccident,"explainedKaren.AlthoughMichaelknewKaren'smotherhaddiedyearsearlier,heneverfullyunderstoodthecircumstancesuntilheskimmedoverthenewspaperarticle.ToKaren'ssurprise,Michaelwasabsorbedinthedetailsoftheaccident.Andhebegantocryuncontrollably.ThenherevealedthatthemanthatpulledKarenfromtheflameswasthefatherheneverknew.Thetwoembracedandshedmanytears,recountingstoriestoldtothemabouttheirpatens.
(29)
A.Michael'sparentsgotdivorced.
B.KarenwasadoptedbyRayAnderson.
C.Karen'smotherdiedinacaraccident.
D.Atruckdriverlosthislifeinacollision.
40.听力原文:W:Stevecalledtoseewhetherwecangivehimalifttothebeachthisweekend.
M:Well,I'llseetothat,butwhetherornotwe'llhaveanyroomforhimisunclear.
Q:Whatdoesthemanmean?
(18)
A.HewillseeStevesoon.
B.Heisafraidtheweatherwillnotbeclear.
C.Heisnotsureiftherewillbeenoughspace.
D.HeisnotsureifhecanfindaroomforSteve.
三、4.ReadingComprehension(ReadinginDepth)(20题)41.
Howwouldanurbaninhabitantusuallyrentacarinthepasteightyears?
42.
Whatdoestheword"education"inthefirstparagraphmean?
A.susceptibilitytotheenvironment
B.advanceinthescaleofevolution
C.complicatedinstinctsofanimals
D.formativeinfluenceoftheenvironment
43.
Thewriterofthearticlewas,undoubtedly______.
A.alinguistB.anattorneyC.ascientistD.anessayist
44.
WhatcanweinferfromParagraph2?
A.Somefamiliesaretoopoortopaythefulltuition.
B.Theparentsdonotfavortheform.ofloans.
C.Payingthetuitionmakestheparentsfeelhumble.
D.Thoseingreatneedmaynotgettheaid.
45.
Theauthorfounditthemostembarrassingthat______.
A.hehadtopracticethepoeminfrontoftheclass
B.hehadtoputfeelingandemotionintothepoem
C.hismistakeswerepointedoutbyMr.Priestley
D.hispracticewasappreciatedbyMr.Priestley
46.
Itcanbeinferredfromthepassagethatpublicservices______.
A.havebenefitedmanypeople
B.arethefocusofpublicattention
C.haveoftenbeenthelaughingstock
D.areaninappropriatesubjectforhumor
47.
Tobeelectedas______wasClinton'sfirstsuccessfulstepofpoliticalcareer.
48.
Whywastheauthor'sfirstteacherfired?
49.
Fromthelasttwoparagraphs,weknowthat______.
A.theviolencewebsitepeddlersfeelsorryforthefamily'sloss
B.itispossibletopreventchildrengetaccesstotheviolenceporn
C.therehasbeenanexpandingconcernaboutothers'privacy
D.theauthorfeelspositiveabouttherebeingnorulesintheInternetworld
50.
WhowasSusanSliwak?
A.Amotherofthreeyear'soldchild.
B.AnIrvingBerlinlyric.
C.Spouseofavictimkilledatthetradecenter.
D.Anemotionalcontemporarypoet.
51.Gamingwillnotbeinfluencedbywidereconomiccycleunlessitbecomesa______.
52.SectionB
Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.Youshoulddecideonthebestchoice.
Ifyougodowntothewoodstoday,youmaymeethigh-techtrees-geneticallymodifiedtospeedtheirgrowthorimprovethequalityoftheirwood.Genetically-engineeredfoodcropshavebecomeincreasinglycommon,albeitcontroversial,overthepasttenyears.Butgeneticengineeringoftreeshaslaggedbehind.
Partofthereasonistechnical.Understanding,andthenaltering,thegenesofabigpinetreearemorecomplexthancreatingabettertomato.Whiletomatoessprouthappily,andrapidly,inthelaboratory,growingawholetreefromasingle,geneticallyalteredcellinatesttubeisatrickyprocessthattakesyears,notmonths.Moreover,littleisknownabouttreegenes.Sometrees,suchaspinetrees,havealotofDNA-roughlytentimesasmuchashuman.And,where-astheHumanGenomeProjectismorethanhalfwaythroughitstaskofisolatingandsequencingtheestimated100,000genesinhumancells,similareffortstoanalyzetreegenesarestilljustsaplings(幼苗).
Giventhelargenumberoftreegenesandthelittlethatisknownaboutthem,treeengineersarestartingwithasearchforgenetic"markers".ThefirststepistoisolateDNAfromtreeswithdesirablepropertiessuchasinsectresistance.ThenextstepistofindstretchesofDNAthatshowthepresenceofaparticulargene.Then,whenyoumatetwotreeswithdifferentdesirableproperties,itissimpletocheckwhichoffspringcontainthemallbylookingforthegeneticmarkers.HenryAmerson,atNorthCarolinaStateUniversity,isusinggeneticmarkerstobreedfungalresistanceintosouthernpines.BillionsofthesearegrownacrossAmericaforpulp(纸浆)andpaper,andoutbreaksofdiseaseareexpensive.Butnotallindividualtreesaresusceptible.Dr.Amerson'sgrouphasfoundmarkersthatdistinguishfungus-resistantstockfromdisease-pronetrees.Usingtraditionalbreedingtechniques,theyareintroducingtheresistancegenesintopinesontestsitesinAmerica.
Usinggeneticmarkersspeedsupold-fashionedbreedingmethodsbecauseyounolongerhavetowaitforthetreetogrowuptoseeifithasthedesiredtraits.Butitismoreasophisticatedform.ofselectivebreeding.Now,however,interestingenetictinkering(基因修补)isalsogainingground.Tothisend,Dr.AmersonandhiscolleaguesaretakingpartinthePineGeneDiscoveryProject,aninitiativetoidentifyandsequencethe50,000-oddgenesinthepinetree'sgenome.Knowingwhichgenedoeswhatshouldmakeiteasiertoknowwhattoalter.
Comparedwithgeneticengineeringoffoodcrops,geneticengineeringoftrees______.
A.beganmuchlater
B.hasdevelopedmoreslowly
C.islessuseful
D.islesscontroversial
53.Accordingtothetext,AmusingOurselvestoDeathisabook______.
A.tellingpeoplehowamusingitistowatchTV
B.warningpeopletooversteptheinstructionsintheBible
C.showingthereisadirectlinkbetweenTV-watchinganddeath
D.criticizingtelevisionforeatingoutourlives
54.SectionA
Directions:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.Pleasemarkthecorrespondingletterforeachitemwithasinglelinethroughthecenter.Youmaynotuseanyofthewordsinthebankmorethanonce.
Theconceptofo
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 江西省吉安市2025届英语七年级第二学期期中检测试题含答案
- 福建省三明市宁化县2025届八下英语期末考试试题含答案
- 肿瘤患者营养护理全程管理方案
- 老年护理学中的临终关怀
- 足球培训宣传
- 基于大数据分析优化课程教学内容与方法
- 2025至2030房屋租赁项目发展趋势分析与未来投资战略咨询研究报告
- 扬州大学《西班牙语精读4》2023-2024学年第一学期期末试卷
- 炎黄职业技术学院《色彩人像》2023-2024学年第一学期期末试卷
- 昭通职业学院《中华医粹走进中医》2023-2024学年第一学期期末试卷
- 公司员工公积金管理制度
- 门窗店员工管理制度
- 护士职业精神课件
- 2020年沈阳职业院校技能大赛中职学生组职业英语(服务类)样题
- 生物学基本知识
- 农业科技产业园发展战略规划与实施路径
- 2025年养老护理员(中级)考试试卷:实操技能解析
- 体育服务综合体建设项目可行性分析 (一)
- 广东深圳2025年公开招聘农村党务(村务)工作者笔试题带答案分析
- 2025-2030中国灭草松原药行业市场现状分析及竞争格局与投资发展研究报告
- 农村自建房业主培训课件
评论
0/150
提交评论