雅思阅读模拟试题Word格式.docx

雅思阅读模拟试题Word格式.docx

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homenotonlytofrogsbuttoallmannerofwildlife.However,asyet,therearenoobviousreasonswhycertainfrogspeciesaredisappearingfromrainforestsinAustraliathathavebarelybeentouchedbyhumanhand.Themysteryisunsettlingtosaytheleast,foritisknownthatamphibianspeciesareextremelysensitivetoenvironmentalvariationsintemperatureandmoisturelevels.ThedangeristhatplanetEarthmightnotonlyloseavitallinkintheecologicalfoodchain（frogskeeppopulationsofotherwisepestilentinsectsatmanageablelevels）,butwemightbeincreasingouroutputofairpollutantstolevelsthatmayhavealreadybecomeirreversible.Frogscouldbeinadvertentlywarningusofacatastrophe.

　　Anexampleofaspeciesoffrogthat,atfarasisknown,hasbecomeextinct,istheplatypusfrog.Likethewell-knownAustralianmammalitwasnamedafter,itexhibitedsomeverystrangebehaviour;

insteadofgivingbirthtotadpolesinthewater,itraiseditsyoungwithinitsstomach.Thebabyfrogswereactuallybornfromoutoftheirmother'

smouth.Discoveredin1981,lessthantenyearslaterthefroghadcompletelyvanishedfromthecrystalclearwatersofBooloumbaCreeknearQueensland'

sSunshineCoast.Unfortunately,thisfreakofnatureisnottheonlyfrogspeciestohavebeenlostinAustralia.Sincethe1970s,nolessthaneightothershavesufferedthesamefate.

　　Onetheorythatseemstofitthefactsconcernsthedepletionoftheozonelayer,awelldocumentedphenomenonwhichhasledtoasharpincreaseinultravioletradiationlevels.TheozonelayerismeanttoshieldtheEarthfromUVrays,butincreasedradiationmaybehavingaGREatereffectuponfrogpopulationsthanpreviouslybelieved.Anothertheoryisthatworldwidetemperatureincreasesareupsettingthebreedingcyclesoffrogs.

　　TRUE/FALSE/NOTGIVEN

　　1.Frogsaredisappearingonlyfromcityareas.

　　2.Frogsandtoadsareusuallypoisonous.

　　3.Biologistsareunabletoexplainwhyfrogsaredying.

　　4.Thefrogs'

naturalhabitatisbecomingmoreandmoredeveloped.

　　5.Attemptsarebeingmadetohaltthedevelopmentofwetmarshland.

　　6.Frogsareimportantintheecosystembecausetheycontrolpests.

　　7.Theplatypusfrogbecameextinctby1991.

　　8.Frogsusuallygivebirthtotheiryounginanunderwaternest.

　　9.EightfrogspecieshavebecomeextinctsofarinAustralia.

10.Thereisconvincingevidencethattheozonelayerisbeingdepleted.

11.Itisafactthatfrogs'

breedingcyclesareupsetbyworldwideincreasesintemperature.

　AnswerKeys：

1.F2.F3.T4.T5.NG6.T7.T8.NG9.F10.T11.F

2014年雅思阅读模拟试题

（2）

Almosteveryonewithorwithoutacomputerisawareofthelatesttechnologicalrevolutiondestinedtochangeforeverthewayinwhichhumanscommunicate,namely,theInformationSuperhighway,bestexemplifiedbytheubiquitousInternet.Already,millionsofpeoplearoundtheworldarelinkedbycomputersimplybyhavingamodemandanaddressonthe`Net'

inmuchthesamewaythatowningatelephonelinksustoalmostanyonewhopaysaphonebill.Infact,sincethecomputerconnectionsaremadeviathephoneline,theInternetcanbeenvisagedasanetworkofvisualtelephonelinks.ItremainstoseeninwhichdirectiontheInformationSuperhighwayisheaded,butmanybelieveitistheeducationalhopeofthefuture.

　　TheWorldWideWeb,anenormouscollectionofInternetaddressesorsites,allofwhichcanbeaccessedforinformation,hasbeenmainlyresponsiblefortheincreaseininterestintheInternetinthe1990s.BeforetheWorldWideWeb,the`Net'

wascomparabletoanintegratedcollectionofcomputerizedtypewriters,buttheintroductionofthe`Web'

in1990allowednotonlytextlinkstobemadebutalsographs,imagesandevenvideo.

　　AWebsiteconsistsofa`homepage'

thefirstscreenofaparticularsiteonthecomputertowhichyouareconnected,fromwhereaccesscanbehadtoothersubjectrelated`pages'

（orscreens）atthesiteandonthousandsofothercomputersallovertheworld.Thisisachievedbyaprocesscalled`hypertext'

.Byclickingwithamousedeviceonvariouspartsofthescreen,apersonconnectedtothe`Net'

cangotraveling,orsurfing'

throughaofthescreen,apersonconnectedtothe`Net'

cangotraveling,or`surfing'

throughawebofpagestolocatewhateverinformationisrequired.

　　Anyonecansetupasite;

promotingyourclub,yourinstitution,yourcompany'

sproductsorsimplyyourself,iswhattheWebandtheInternetisallabout.Andwhatismore,informationontheInternetisnotownedorcontrolledbyanyoneorganization.Itis,perhaps,truetosaythatnooneandthereforeeveryoneownsthe`Net'

.BECauseoftherelativefreedomofaccesstoinformation,theInternethasoftenbeencriticisedbythemediaasapotentiallyhazardoustoolinthehandsofyoungcomputerusers.Thisperceptionhasprovedtobelargelyfalsehowever,andthevastmajorityofusersbothyoungandoldgetconnectedwiththeInternetforthedualpurposesforwhichitwasintended-discoveryanddelight.

　　1.EveryoneisawareoftheInformationSuperhighway.

　　2.UsingtheInternetcoststheownerofatelephoneextramoney.

　　3.Internetcomputerconnectionsaremadebyusingtelephonelines.

　　4.TheWorldWideWebisanetworkofcomputerisedtypewriters.

　　5.Accordingtotheauthor,theInformationSuperhighwaymaybethefuturehopeofeducation.

　　6.Theprocesscalled`hypertext'

requirestheuseofamousedevice.

　　7.TheInternetwascreatedinthe1990s.

　　8.The`homepage'

isthefirstscreenofa`Web'

siteonthe`Net'

.

　　9.ThemediahasoftencriticisedtheInternetbecauseitisdangerous.

　　10.Thelatesttechnologicalrevolutionwillchangethewayhumanscommunicate.

1.F2.NG3.T4.F5.T6.T7.F8.T9.F10.T

　2014年雅思阅读模拟试题（3）

1.Thefailureofahigh-profilecholesteroldrughasthrownaspotlightonthecomplicatedmachinerythatregulatescholesterollevels.Butmanyresearchersremainconfidentthatdrugstoboostlevelsof’good’cholesterolarestilloneofthemostpromisingmeanstocombatspirallingheartdisease.

　　2.DrugcompanyPfizerannouncedon2Decemberthatitwascancellingallclinicaltrialsoftorcetrapib，adrugdesignedtoraiseheart-protectivehigh-densitylipoproteins（HDLs）。

Inatrialof15000patients，asafetyboardfoundthatmorepeoplediedorsufferedcardiovascularproblemsaftertakingthedrugplusacholesterol-loweringstatinthanthoseinacontrolgroupwhotookthestatinalone.

　　3.Thenewscameasakickintheteethtomanycardiologistsbecauseearliertestsinanimalsandpeoplesuggesteditwouldlowerratesofcardiovasculardisease.“Therehavebeennoredflagstomyknowledge，”saysJohnChapman，aspecialistinlipoproteinsandatherosclerosisattheNationalInstituteforHealthandMedicalResearch（INSERM）inPariswhohasalsostudiedtorcetrapib.“Thiscancellationcameasacompleteshock.”

　　4.TorcetrapibisoneofthemostadvancedofanewbreedofdrugsdesignedtoraiselevelsofHDLs，whichferrycholesteroloutofartery-cloggingplaquestotheliverforremovalfromthebody.Specifically，torcetrapibblocksaproteincalledcholesterolestertransferprotein（CETP），whichnormallytransfersthecholesterolfromhigh-densitylipoproteinstolowdensity，plaque-promotingones.Statins，incontrast，mainlyworkbyloweringthe’bad’low-densitylipoproteins.

　　Underpressure

　　5.Researchersarenowtryingtoworkoutwhyandhowthedrugbackfired，somethingthatwillnotbecomeclearuntiltheclinicaldetailsarereleasedbyPfizer.Onehintliesinevidencefromearliertrialsthatitslightlyraisesbloodpressureinsomepatients.Itwasthoughtthatthismildproblemwouldbeoffsetbytheheartbenefitsofthedrug.Butitispossiblethatitactuallyprovedfatalinsomepatientswhoalreadysufferedhighbloodpressure.Ifbloodpressureistheexplanation，itwouldactuallybegoodnewsfordrugdevelopersbecauseitsuggeststhattheproblemsarespecifictothiscompound.OtherprototypedrugsthatarebeingdevelopedtoblockCETPworkinaslightlydifferentwayandmightnotsufferthesamedownfall.

　　6.ButitisalsopossiblethatthewholeideaofblockingCETPisflawed，saysMotiKashyap，whodirectsatherosclerosisresearchattheVAMedicalCenterinLongBeach，California.WhenHDLsexcretecholesterolintheliver，theyactuallyrelyonLDLsforpartofthisprocess.SoinhibitingCETP，whichpreventsthetransferofcholesterolfromHDLtoLDL，mightactuallycauseanabnormalandirreversibleaccumulationofcholesterolinthebody.“You’reblockingaphysiologicmechanismtoeliminatecholesterolandeffectivelyconstipatingthepathway，”saysKashyap.

　　Goingup

　　7.Mostresearchersremainconfidentthatelevatinghighdensitylipoproteinslevelsbyonemeansoranotherisoneofthebestroutesforhelpingheartdiseasepati