大学英语考试复习资料大学六级模拟971.docx

大学英语考试复习资料大学六级模拟971.docx

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大学英语考试复习资料大学六级模拟971

[大学英语考试复习资料]大学六级模拟97

大学六级模拟97

PartⅠWriting

Directions:

Forthispart,youareallowed30minutestowriteacompositiononthetopic:

AbilityandGoodLooks.Youshouldwriteatleast150wordsfollowingtheoutlinegivenbelow:

问题:

1.目前在中国，校园安全事故时有发生

2．这种现象造成了恶劣的影响

3．应该如何杜绝这种现象

答案:

OnCampusSecurity

①Haveyoueverheardofthephenomenonthataccidentsconcerningcampussecurityfrequentlyoccurin,someprimaryschools?

②Itisthisissuethathasshockedthepublicandsparkedaheateddiscussion.

③Thisphenomenoncanimposeaquitenegativeimpactontheindividualaswellasthewholesociety.④Firstofall,thecruelscenehasmademanypassers-bypanic,nottomentiontheintensegriefsufferedbytherelativesoftheyoungvictims.⑤Besides,phenomenaofthissortwilldefinitelyposeathreattothestabilityandsecurityofthewholesociety.⑥Somepeopleevenlosetheirconfidenceinleadingasecureandhappylife.

⑦Frommypersonalperspective,severalcounter-measurescanbetaken.⑧Foronethings,relevantauthoritiesaretomakesurethatsomeequipmentisavailableincaseofemergencies.⑨Foranother,activitiesaretobelaunchedtoenhancethesafetyawarenessofthepupilsaswellastheirparents.⑩Onlyinthiswaycanwefinallygetridofthiskindofphenomena.①采用疑问句的形式提出校园安全事件屡屡发生的社会现象。

②固定结构表现话题重要性。

③第二段的主旨句：

该现象对个人及社会产生负面影响；impose…impacton是高分词组。

④指出第一个影响：

引起恐慌，带来痛苦；其中nottomention是一个高分结构，sufferedby…是过去分词作后置定语。

⑤引出第二个负面影响：

威胁社会安全与稳定；其中poseathreatto是高分词组。

⑥对上句做进一步解释说明，loseconfidencein是高分词组。

⑦是表达作者个人观点的固定词组。

⑧指出政府层面应采取的措施。

⑨提出开展活动提高家长和孩子的安全意识。

⑩总结全文。

采用部分倒装结构，体现句子结构的多样性。

好句操练

★Itisthisissuethathasshockedthepublicandsparkedaheateddiscussion.

a.Thisissuehasdrawnthepublic'sattention,whichhasstimulatedaheateddebate.

b.Thisissuehasraisedthepublic'sconcernsandstirredupanintensedebate.

★Foronethings,relevantauthoritiesaretomakesurethatsomeequipmentisavailableincaseofemergencies.

a.Tobeginwith,relevantauthoritiesareexpectedtomakesomeequipmentavailableforfearofemergencies.

b.Ononehand,relevantauthoritiesaresupposedtopreparesomeequipmentavailableforemergencies.

PartⅡReadingComprehension（SkimmingandScanning）

Directions:

Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.

Forquestions1-4,mark

Y（forYES）ifthestatementagreeswiththeinformationgiveninthepassage;

N（forNO）ifthestatementcontradictstheinformationgiveninthepassage;

NG（forNOTGIVEN）iftheinformationisnotgiveninthepassage.

Forquestions5-10,completethesentenceswiththeinformationgiveninthepassage.

Earth:

MeltingintheHeat?

Glaciersaremelting;theicecapsaredisappearingintotheoceans;sealevelsmayrisebymanymetersasaconsequence.Indigenous（本土的）Arcticpeopleswillfindtheirfoodstocksgone,whilefleshwatersuppliesinAsiaandsouthAmericawilldisappearastheglacierswhichprovidethemmeltaway;penguins,polarbearsandsealswillfindtheirhabitatsgone,theirtraditionallivesunlivable.

Buthowrealisticisthispicture?

Istheworld'sicereallydisappearing,orisitunscientifichotair?

AEuropeansatellitenamedCryosatwasdesignedtoprovidedefinitiveanswerstosomeofthesequestions.AlauncherfaultdestroyedthemissioninOctober2005,huttheEuropeanSpaceAgencyhasapprovedareplacement,inthemeantime,hereisourglobalsnapshot.

TheAntarctic

Huge,pristine（质朴的）,dramatic,unforgiving--theAntarcticiswherethebiggestofallglobalchangescouldbegin.

Thereissomuchiceherethatifitallmelted,sealevelsgloballywouldrisehugely-perhapsasmuchas80m.SaygoodbyetoLondon,NewYork,Sydney,Bangkok...infact,themajorityoftheworld'smajorcities.

Butwillithappen?

ScientistsdividetheAntarcticintothreezones:

theeastandwestAntarcticicesheets;andthePeninsula,thetongueoflandwhichpointsuptowardsthesoutherntipofSouthAmerica.

"EverybodythinksthattheAntarcticisshrinkingduetoclimatechange,buttherealityismuchmorecomplex,"saysDavidVaughan,aprincipalinvestigatorattheBritishAntarcticSurveyinCambridge,U.K."Partsofitappeartobethickeningasaresultofsnowfallincreases,butthePeninsulaisthinningatanalarmingrateduetowarming.TheWestAntarcticsheetisalsothinning,andwe'renotsureofthereasonwhy."

OntheUp

TemperaturesinthePeninsulaappeartobeincreasingataroundtwicetheglobalaverage—about2℃overthelast50years.Thosefiguresarebasedonmeasurementsmadebyinstrumentsatscientificstations.

Earlierthisyear,DavidVaughan'sgrouppublishedresearchshowingthatthevastmajorityofglaciersalongthePeninsula--87%ofthe244studied--areinretreat.Theicedumpedintotheoceanastheglaciersretreatshouldnotmakemuchdifferencetoglobalsealevels--perhapsafewcentimeters.

Moreworrying,potentially,arethevasticesheetscoveringtherestofAntarctica.Makingtemperaturemeasurementsforthecontinentasawholeisdifficult;itisavastplace--morethan2,000kmacross---therearefewresearchstations,andtemperaturesvarynaturallyby2-3℃fromyeartoyear.Butmeasurementsindicatethatinthewest,meltingisunderway.

"Aboutone-thirdoftheWestAntarcticicesheetisthinning,"saysDr.Vaughan,"unaveragebyabout10cmperyear,butintheworstplacesby3～4mperyear."

TherockonwhichtheWestAntarcticicerestsisbelowsealevel,andBritishAntarcticSurveyresearchersbelievethethinningcouldbeduetotheicesheetmeltingonitsunderside.

"Itmaybethattheoceaniswarmingendthat'scausingtheicetomelt,buttheremaybeotherreasonsaswell;forexample,there'slotsofvolcanisminthatareaandsothatcouldchangehowmuchheatisdeliveredtotheundersideoftheicesheet."

CryosatshouldhelptopindownwhatishappeningattheWestAntarcticfringe.TheradaraltimetersonboarditspredecessorsERS1andERS2havebeenunabletomapthesteepslopesatthecoast,whereasCryosat'sinstrumentshouldbeabletocope.

IftheentireWestAntarcticicesheetdidmelt,sealevelsgloballywouldrise,byaround5m.Butatthemoment,thereisnosignofthathappening.

OnerecantscientificpaperattemptedtocalculateprobabilitiesforhowmuchWestAntarcticmeltingwouldcontributetoglobalsea-levelrisesduringthiscentury.Theconclusions:

a30%probabilityofa20cmrise,anda5%chanceofa1mrise.

EasternMass

Andwhatofthebigmonster,themuchlargerEastAntarcticsheet?

Arecentstudyusingaltimeterdatasuggesteditisgettingthicker,byabout1.8cm/yr;another,usingthegravitysatellitemissionGraceindicatesitsmassremainsstable.Butcouldrisingtemperaturesintimedraintheiceaway?

.

"Itisnotgoingtohappenonanyrealistichumantimescale,"saysDavidVaughan."It'ssocoldthatyoucouldraisetemperaturesby5-10℃withouthavingmuchofanimpact;it'sonrockabovesealevel,sowarmingintheoceancan'taffectit."

Largelyinsulatedfromglobaltrendsandsobigastogenerateitsownclimaticsystems,mostofAntarcticaappearstobeimmunetothebigmeltfornow,thoughanswerstowhatishappeninginthewestarceagerlyawaited.

TheArctic

Atthetopoftheworld,theArcticisaregionbuiltonwater.AroundtheNorthPoleisocean,withicefloescrowdingineachwinterandthinningagaininthesummers.

InSeptember,welearnedfromscientistsattheU.S.NationalSnowandIceDataCenterthattheextentofoceancoveredbyiceisgettingsmallereachyear,thecurrentrateofshrinkagetheycalculateataround8%perdecade.Theirprojectionisthatwithinabout60years,therewillbenosummericeatallontheArcticOcean.

"Overall,theextenthasbeendeclining,withsomeoscillations（摆动）,sincethe1970swhensatelliteswereabletomapit,"commentsPeterWadhams,ProfessorofOceanPhysicsatCambridgeUniversity,U.K,andcurrentlyattheLaboratoireOceanographiqueinVillefranche-sur-mer,France."There'sbeenaslowdecline,butnowthethinningappearstobemorerapid.Inthelasttwodecades,notonlyhastheareashrunkbuttheicehasgotthinnerbyabout400;thepredictionisthatitwillvanishaltogetherduringsummersinthesecondhalfofthiscentury."

MilitaryRecords

Measurementsofthicknesscomemainlyfrommilitarysubmarines,whichspentlongperiodsundertheArcticiceduringtheColdWar.

PeterWadhamswasoneofthescientistswhoafterwardspersuadedtheauthoritiesinBritainandtheUnitedStatestodeclassifytheirdata.

Butasamethodofmeasurement,itisfarfromperfect;andsatelliteshavegivenonlylimitedhelp.Theexistingsatellitefleetgivesgoodmeasurementsoficeextent,butisnotsogoodatdetectingthickness,partlybecausetheorbitsofsatelliteswithradaraltimetersdonotcovereveryportionoftheocean.

Thisdatadeficithasledtoarivaltheory--thattheiceisnotmeltingatall;itissimplypilingupinanotherpartoftheocean,perhapsalongthenorthCanadiancoast.

PeterWadhamsbelieveshehasnowdisprovedthisidea."Wedidanexperimentwhereweinstalledasetofbuoys（浮标）inthatregionwhichmeasurethethicknessoftheiceandtransmititbackviasatellite,"hesays."Thebuoysitsontheice,anduswavespassunderittheymakeitriseandfall,justbyamillimeterortwo;measuringthisallowsyoutocalculatethethicknessoftheice."

Thepreliminaryresults,announcedatascientificmeetinginApril2005,showthattheextraiceisnotthere;itreallyhasmeltedaway.