大学英语四级阅读理解试题及答案Word文档下载推荐.docx
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notprotectthemfromwind
themtogrowtooquickly
someofthesmallsidebranches
isaspecialsubstancepaintedonthetree?
makeawoundsmooth
preventdiseaseenteringawound
coveraroughsurface
helpawoundtodry
goodgardenerprunesatree______.
intervalsthroughouttheyear
quicklyaspossible
whennecessary
everywinter
wastheauthor'
spurposewhenwritingthispassage?
givepraticalinstructionforpruningatree.
giveageneraldescriptionofpruning
explainhowtreesdevelopdiseases
discussdifferentmethodsofpruning.
答案:
babca
十七
OnThursdayafternoonMrs.Carke,dressedforgoingout,tookherhandbagwithhermoneyandherkeyinit,pulledthedoorbehindhertolockitandwenttotheover60sClub.ShealwayswentthereonThursdays.Itwasaniceoutingforanoldwomanwholivedalone.
Atsixo'
clockshecanehome,letherselfinandatoncesmeltcigarettesmoke.Cigarettesmokeinherhouse?
How?
Hadsomeonegotin?
Shecheckedthebackdoorandthewindows.Allwerelockedorfastened,asusual.Therewasnosignofforcedentry.
Overacupofteashewonderedwhethersomeonemighthaveakeythatfittedherfrontdoor-"
amasterkey"
perhaps.SoshestayedathomethefollowingThursday.Nothinghappened.Wasanyonewatchinghermovements?
OntheThursdayafterthatshewentoutatherusualtime,dressedasusual,butshedidn'
tgototheclub.Insteadshetookashortcuthomeagain,lettingherselfinthroughhergardenandthebackdoor.Shesettleddowntowait.
Itwasjustafterfouro'
clockwhenthefrontdoorbell.Clarkewasmakingacupofteaatthetime.Thebellrangagain,andthensheheardherletter-boxbeingpushedopen.Withthekettleofboilingwaterinherhand,shemovedquietlytowardsthefrontdoor.Alongpieceofwireappearedthroughtheletter-box,andthenahand.Thewireturnedandcaughtaroundtheknobonthedoor-lock.Mrs.Clarkeraisedthekettleandpouredthewateroverthehand.Therewasashoutoutside,andtheskinseemedtodropoffthefingerslikeaglove.Thewirefelltothefloor,thehandwaspulledback,andMrs.Clarkeheardthesoundofrunningfeet.
.ClarkeloodedforwardtoThursdaybecause_______.
workedataclubontheday
saidvisitorsonThursdays
visitedaclubonThursday
specialvisitorcameonThursday
someonehadmadeaforcedentery,_______.
wouldhavefoundabrokendoororwindow
orshewasstillinthehouse
wouldhavebeenthownabout
orshewouldhaveneededamasterkey
thethirdThursdayMrs.Clarkewentout_______.
shedidn'
twanttomisstheclubagain
seeifthethiefwashngingaboutoutside
theclubbutthenchangedhermind
anattempttotrickthethief
lockonthefrontdoorwasonewhich_______.
apieceofwiretoopenit
heopenedfrominsidewithoutakey
'
tbeopenedwithoutakey
aknobinsteadofakey
wirefeeltothefloor_______.
refusedtoopenthedoor
theman'
sglovedroppedoff
itwastoohottohold
themanjustwantedtogetaway
cadbd
十八
Manypeoplebelievetheglarefromsnowcausessnowblindnenss.Yet,darkglassesornot,theyfindthemselvessufferingfromheadachesandwateringeyes,andevensnowblindness,whenexposedtoseveralhoursof"
snowlight"
.
TheUnitedStatesArmyhasnowdeterminedthatglarefromsnowdoesnotcausesnowblindnessintroopsinasnow-covered,aman'
seyesfrequentlyfindnothingtofoucsoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchoftsomethingtolookat.Findingnothing,hourafterhour,theeyesneversotpsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationbyproducingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblurs,thenisobsured,andtheresultistotal,eventhoughtemporary,snowblindness.
ExperimentsledtheArmytoasimplemethodofovercomingthisproblem.Scoutsaheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushes,creatingadottedlineastheycrosscompletelysnow-coveredlandscape,Eventhescoutsthemselvesthrowlightweight,darkcoloredobjectsaheadonwhichtheytoocanfocus.Themenfollowingcanthenseegazeisarrested.Theireyesfocusonabushandhavingfoundsomethingtosee,stopscouringthesnow-blanketedlanscape.Byfocusingtheirattentionononeobjectatatime,themencancrossthesnowwithoutbecominghopelesslysnowblindorlost.Inthiswaytheproblemofcrossingasolidwhiteterrainisovercome.
preventheadaches,wateringeyesandblindnesscausedbytheglarefromsnow,darkglassesare_____.
theeyesaresoretearsareproducedto________.
thevision
snowblindness
theirritation
themuscles
maybeavoidedby_______.
tothesolidwhiteterrain
forsomethingtolookatinsnow-coveredterrain
theeyeswithsomethingtofoucson
theeyeballswithfluid
scoutsshakesnowfromevergreenbushesinorderto_______.
themenbehindsomethingtosee
thelandscape
themselvesinthecold
themenbehindfromlosingtheirway
suitabletitleforthispassagewouldbe_______.
andhowtoovercomeit
scureforsnowblindness
inthesnow
vision
CCCAA
十九
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.
purposeofthispassageis______.
alertthereadertothedwindlingwatersupply
explainindustrialusesofwater
acquaintthereaderwithwaterpollutionproblems
demostratevariousmeasurestosolvethepollutionproblem
ofthefollowingpointsisNOTINCLUDEDinthepassage?
dustrialdevelopmentincudesthesimplificationofcomplexchemicalprocesses.
wastesneedscertainamountofwater
forwaterwillgoupalongwiththeexpandingpopulation
cultivationoflandrequiresmoreandmorechemicals
readercanconcluedthat________.
oftheworldwillworktogetheronpolutionproblems
fromwastesleadtoamoreprosperousmarketplace
ismakinggreatprogressonincreasingwatersupplies
industriesare