四级考试阅读练习.docx
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四级考试阅读练习.docx
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四级考试阅读练习
四级考试阅读练习
18、Manypeoplebelievetheglarefromsnowcausessnowblindnenss.Yet,darkglassesornot,theyfindthemselvessufferingfromheadachesandwateringeyes,andevensnowblindness,whenexposedtoseveralhoursof"snowlight".
TheUnitedStatesArmyhasnowdeterminedthatglarefromsnowdoesnotcausesnowblindnessintroopsinasnow-coveredcountry.Rather,aman'seyesfrequentlyfindnothingtofoucsoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchoftsomethingtolookat.Findingnothing,hourafterhour,theeyesneversotpsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationbyproducingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblurs,thenisobsured,andtheresultistotal,eventhoughtemporary,snowblindness.
ExperimentsledtheArmytoasimplemethodofovercomingthisproblem.Scoutsaheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushes,creatingadottedlineastheycrosscompletelysnow-coveredlandscape,Eventhescoutsthemselvesthrowlightweight,darkcoloredobjectsaheadonwhichtheytoocanfocus.Themenfollowingcanthenseesomething.Theirgazeisarrested.Theireyesfocusonabushandhavingfoundsomethingtosee,stopscouringthesnow-blanketedlanscape.Byfocusingtheirattentionononeobjectatatime,themencancrossthesnowwithoutbecominghopelesslysnowblindorlost.Inthiswaytheproblemofcrossingasolidwhiteterrainisovercome.
1.Topreventheadaches,wateringeyesandblindnesscausedbytheglarefromsnow,darkglassesare_____.
a.indispensible
b.useful
c.ineffective
d.available
2.Whentheeyesaresoretearsareproducedto________.
a.clearthevision
b.remedysnowblindness
c.easetheirritation
d.loosenthemuscles
3.Snowblindnessmaybeavoidedby_______.
a.concentratingtothesolidwhiteterrain
b.searchingforsomethingtolookatinsnow-coveredterrain
c.providingtheeyeswithsomethingtofoucson
d.coveringtheeyeballswithfluid
4.Thescoutsshakesnowfromevergreenbushesinorderto_______.
a.bivethemenbehindsomethingtosee
b.beautifythelandscape
c.warmthemselvesinthecold
d.preventthemenbehindfromlosingtheirway
5.Asuitabletitleforthispassagewouldbe_______.
a.snowblindnessandhowtoovercomeit
b.natrue'scureforsnowblindness
c.soldiersinthesnow
d.snowvision
参考答案:
C C C A A
19、Waterproblemsinthefuturewillbecomenoreintenseandmorecomplex.Ourincreasingpopulationwilltremendouslyincreaseurbanwastes,primarilysewage.Ontheotherhand,increasingdemandsforwaterwilldeceasesubstantialytheamountofwateravailablefordilutingwastes.Rapidlyexpandingindustrieswhichinvolvemoreandmorecomplexchemicalprocesseswillproducelargevolumesofliquidwastes,andmanyofthesewillcontainchemicalswhicharenoxious.Tofeedourrapidlyexpandingpopulation,agriculturewillhavetobeintensified.Thiswillinvolveever-increasingquantitiesofagriculturalchemicals,Fromthis,itisapparentthatdrasticstepsmustbetakenimmediatelytodevelopcorrectivemeasuresforthepollutionproblem.
Therearetwowaysbywhichthispollutionproblemcanbedwindled.Thefirstrelatestothetreatmentofwastestodecreasetheirpollutionhazard.Thisinvolvestheprocessingofsolidwastes"priorto"disposalandthetreatmentofliquidwastes,orefflunets,topermitthereuseofthewaterorminimizepollutionuponfinaldisposal.
Asecondapproachistodevelopaneconomicuseforallorapartofthewastes.Farmmanureisspreadinfieldsasanutrientororganicsupplement.Effluentsfromsewagedisposalplantsareusedinsomeareasbothforirrigationandforthenutrientscontained.Efflunetsfromotherprocessingplantsmayalsobeusedasasupplementalsourceofwater.Manyindustries,suchasmeatandpoultryprocessingplants,arecurrentlyconvertingformerwasteproductsintomarketablebyproducts.Otherindustriesarepotentialeonomicusesforwasteproducts.
1.Thepurposeofthispassageis______.
a.toalertthereadertothedwindlingwatersupply
b.toexplainindustrialusesofwater
c.toacquaintthereaderwithwaterpollutionproblems
d.todemostratevariousmeasurestosolvethepollutionproblem
2.WhichofthefollowingpointsisNOTINCLUDEDinthepassage?
a.Industrialdevelopmentincudesthesimplificationofcomplexchemicalprocesses.
b.Dilutingwastesneedscertainamountofwater
c.Demandsforwaterwillgoupalongwiththeexpandingpopulation
d.Intensivecultivationoflandrequiresmoreandmorechemicals
3.Thereadercanconcluedthat________.
a.countriesoftheworldwillworktogetheronpolutionproblems
b.byproductsfromwastesleadtoamoreprosperousmarketplace
c.scienceismakinggreatprogressonincreasingwatersupplies
d.someindustriesarenow,akingeconomicuseofwastes
4.Theauthorgivessubstancetothepassagethroughtheuseof_______.
a.interviewswithauthoritiesinthefieldofwatercontrols
b.opinionsandpersonalobservations
c.definitionswhichclarifyimportantterms
d.strongargumentsandpersuasions
5.Thewords"priorto"(para.2)probablymean______.
a.after
b.during
c.before
d.beyond
参考答案:
c a d b c
20、Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnesstoadmitone'smistakes.Itisextremelyhardsometimestosayasimplethinglike"Iwaswrongaboutthat,"anditisevenhardertosay,"Iwaswrong,andyouwererightaboutthat."
Ihadanexperiencerecentlywithsomeoneadmittingtomethathehadmadeamistakefifteenyearsago.HetoldmehehadbeenthemanagerofacertaingrocerystoreintheneighbourhoodwhereIgrewup,andheaskedmeifIrememberedtheeggcartons.ThenherelatedanincidentandIbegantoremembervaguelytheincidenthewasdescribing.
Iwasabouteightyearsoldatthetime,andIhadgomeintothestorewithmaymothertodotheweeklygroceryshopping.Onthatparticularday,Imusthavefoundmywaytothedairyfooddepartmentwheretheincidenttoodplace.
Theremusthavebeenaspecialsaleoneggsthatdaybecausetherewasanimpressivedisplayofeggsindozenandhalf-dozencartons.Thecartonswerestackedthreeorfourfeethigh.Imusthavestoppedinfrontofadisplaytoadmirethestacks.Justthenawomancamebypushinghergrocerycartandknockedoffthestacksofcartons.Forsomereason,Idecideditwasuptometoputthedisplaybacktogether,soIwanttowork.
Themanagerheardthemoiseandcamerushingovertoseewhathadhappened.Whenheappeared,Iwasonmykneesinspectingsomeofthecartonstoseeifanyoftheeggswerebroken,buttohimitlookedasthoughIwastheculprit.Heseverelyreprimandedmeandwantedmetopayforanybrokeneggs.Iprotestedmyinnocenceandtriedtoexplain,butitdidnogood.EventhoughIquicklyforgotallabouttheincident,apparentlythemanagerdidnot.
1.Howoldwastheauthorwhenhewrotethisarticle?
a.about8
b.about18
c.about23
d.about15
2.Whowastoblameforknockingoffthestacksofcartons?
a.Theauthor
b.Themanager
c.Awoman
d.Theauthor'smother
3.Whichofthefollowingstatementsisnottrue?
a.Thewomanwhoknockedoffthestacksofcartonswasseriouslycriticizedbythemananger
b.Theauthorwasseverelycritizizedbythemanager.
c.Awomancarelesslyknockedoffthestacksofcartons
d.Itwastheauthorwhoputthedisplaybacktogether
4.Whichofthefollowingcanserveasthebesttitleforthepassage?
a.ItsHardertoAdmitOne'sMistake
b.Iwasoncetheculprit
c.Irememberanincident
d.Acaseofmistakenidentity
5.Thetoneofthearticleexpressestheauthor's_______.
a.admirationforthemanager'swillingnesstoadmitmistakes
b.angertothemanagerforhiswrongaccusation
c.indignationagainstthewomanwhoknockedoffthestacksofcartons
d.regetforthemistakethemadeinthestore
参考答案:
c c a d a
21、Flyingoveradesertareainanairplane,twoscientistslookeddownwithtrainedeyesattreesandbushes.Afteranhour'sflightoneofthescientistswroteinhisbook,'Lookhereforprobablemetal'Scientistsinanotherairplane,flyingoveramountainregion,sentamessagetootherscientistsontheground,'Goldpossible.'Walkingacrosshillyground,fourscientistsreported,'Thisgroundshouldbesearchedformetals.'Fromanairplaneoverahillywastelandascientistsentbackbyradiooneword,'Uranium'.
NoneofthescientistshadX-rayeyes:
theyhadnomagicpowersforlookingdownbelowtheearth'ssurface.Theyweremerelyputtingtouseoneofthenewestmethodsoflocationmineralsintheground---usingtreesandplantsassignsthatcertainmineralsmayliebeneaththegroundonwhichthetreesand
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