大学英语四级阅读理解试题及答案docWord格式文档下载.docx
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大学英语四级阅读理解试题及答案docWord格式文档下载.docx
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thesmallbranchesthicker
becomeunhealthyifthegardener______.
toomanybranchestogrowinthemiddle
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,tookherhandbagwith
hermoneyandherkeyinit,pulledthedoorbehindhertolockitandwenttotheover60sClub.ShealwayswentthereonThursdays.Itwasaniceoutingforanoldwomanwholivedalone.
Atsixo'
clockshecanehome,letherselfinandatoncesmeltcigarettesmoke.Cigarettesmokeinherhouse?
How?
Hadsomeonegotin?
Shecheckedtheback
doorandthewindows.Allwerelockedorfastened,asusual.Therewasnosignofforcedentry.
Overacupoftea
shewonderedwhether
someonemighthaveakeythat
fitted
her
frontdoor-"
amasterkey"
perhaps.SoshestayedathomethefollowingThursday.
Nothing
happened.Wasanyonewatching
hermovements?
Onthe
Thursday
after
that
she
wentout
ather
usual
time,dressed
as
usual,
but
shedidn'
t
gotothe
club.
Instead
shetook
ashort
cut
homeagain,
letting
herself
inthrough
hergarden
andthe
back
door.Shesettleddowntowait.
Itwasjustafterfouro'
clockwhenthefrontdoorbell.Clarkewasmakinga
cupofteaatthetime.Thebellrangagain,andthensheheardherletter-boxbeing
pushedopen.Withthekettleofboilingwaterinherhand,shemovedquietlytowards
thefrontdoor.Alongpieceofwireappearedthroughtheletter-box,andthena
hand.Thewireturnedandcaughtaroundtheknobonthedoor-lock.Mrs.Clarkeraised
thekettleandpouredthewateroverthehand.Therewasashoutoutside,andthe
skinseemedtodropoffthefingerslikeaglove.Thewirefelltothefloor,thehandwaspulledback,andMrs.Clarkeheardthesoundofrunningfeet.
.ClarkeloodedforwardtoThursdaybecause_______.
workedataclubontheday
saidvisitorsonThursdays
visitedaclubonThursday
specialvisitorcameonThursday
someonehadmadeaforcedentery,_______.
wouldhavefoundabrokendoororwindow
orshewasstillinthehouse
wouldhavebeenthownabout
orshewouldhaveneededamasterkey
thethirdThursdayMrs.Clarkewentout_______.
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'
seyesfrequentlyfindnothing
tofoucsoninabroadexpanseofbarrensnow-coveredterrain.Sohisgazecontinuallyshiftsandjumpsbackandforthovertheentirelandscapeinsearchoftsomething
tolookat.Findingnothing,hourafterhour,theeyesneversotpsearchingandtheeyeballsbecomesoreandtheeyemusclesache.Natureoffsetsthisirritationby
producingmoreandfluidwhichcoverstheeyeball.Thefluidcoverstheeyeballinincreasingquantityuntilvisionblurs,thenisobsured,andtheresultistotal,eventhoughtemporary,snowblindness.
Experiments
ledthe
Armytoasimplemethod
ofovercomingthisproblem.
Scouts
aheadofamainbodyoftroopsaretrainedtoshakesnowfromevergreenbushes,
creatingadottedlineastheycrosscompletelysnow-coveredlandscape,Eventhe
scoutsthemselvesthrow
lightweight
darkcoloredobjects
aheadonwhichtheytoo
canfocus.Themenfollowingcanthensee
gazeisarrested.Theireyesfocuson
abushandhaving
found
somethingto
see,stop
scouring
the
snow-blanketed
lanscape.
Byfocusingtheir
attention
ononeobjectatatime,the
mencancrossthesnowwithout
becominghopelesslysnowblind
orlost.Inthis
waytheproblemofcrossingasolid
whiteterrainisovercome.
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.Our
increasing
population
willtremendously
increase
urbanwastes,primarily
sewage.On
theotherhand,increasingdemandsforwaterwilldeceasesubstantialytheamount
ofwater
availablefor
diluting
wastes.
Rapidly
expanding
industries
which
involve
moreandmorecomplexchemical
processes
willproduce
large
volumes
of
liquid
wastes,
andmanyofthesewillcontainchemicalswhicharenoxious.Tofeedourrapidly
expandingpopulation,agriculturewillhavetobeintensified.Thiswillinvolve
ever-increasingquantities
agricultural
chemicals,
Fromthis,it
is
apparentthat
drasticstepsmustbetakenimmediatelytodevelopcorrectivemeasuresforthepollutionproblem.
Therearetwowaysbywhichthispollutionproblemcanbedwindled.Thefirst
relatestothetreatmentofwastestodecreasetheirpollutionhazard.Thisinvolves
theprocessingofsolidwastes"
priorto"
disposalandthetreatmentofliquidwastes,
orefflunets,topermitthereuseofthewaterorminimizepollutionuponfinaldisposal.
Asecondapproachistodevelopaneconomicuseforallorapartofthewastes.
Farmmanureisspreadinfieldsasanutrientororganicsupplement.Effluentsfrom
sewagedisposalplantsareusedinsomeareasbothforirrigationandforthe
nutrientscontained.Efflunetsfromotherprocessingplantsmayalsobeusedasa
supplementalsourceofwater.Manyindustries,suchasmeatandpoultryprocessing
plants,arecurrentlyconvertingformerwasteproductsintomarketable
Otherindustriesarepotentialeonomicusesforwasteproducts.
purposeofthispassageis______.
alertthereadertothedwindlingwatersupply
explainindustrialusesofwater
acquaintthereaderwithwaterpollutionproblems
demostratevariousmeasurestosolvethepollutionproblem
ofthefollowingpointsisNOTINCLUDEDinthepassage?
dustrialdevelopmentincudesthesimplificationofcomplexchemical
wastesneedscertainamountofwater
forwaterwillgoupalongwiththeexpandingpopulation
cultivationoflandrequiresm
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