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大學(xué)英語四級考試15選10專項(xiàng)訓(xùn)練
UnitOne
Questions1to10arebasedonthefollowingpassage.
Lookingbackonyearsoflivinginaworking-classhomeintheNorthofEngland,Ishouldsaythatagoodlivingroom
must1J.threeprincipalthings:homeliness,warmthandplentyofgoodfood.Theliving-roomisthewarmheartofthe
familyand]_2oftenslightlystuffytoamiddle-classvisitor.Itisnotasocialcentrebutafamilycenter;littleentertaining
goesonthereorinthefrontroom,iftherej_3tobeone;youdonotentertaininanythingapproachingthemiddle-class14
Thewife'ssociallifeoutsideher15familyisfoundoverthewashing-line,althelittleshoponthecomer,visitingrelativesat
amoderateJ6occasionally,andperhapsnowandagainavisitwithherhusbandtohispuborclub.Apartfromthesetwo
places,hehasjusthisworkandhisfootballmatches.Theywillhave,eachofthem,friendsatalltheseplaces,whomay
wellnotknowwhattheinsideof(heirhouseislike,havingnever"steppedacrossthe(hreshold/1astheold17phrasehasit.
Thefamilyhearthis18forthefamilyitself,andthosewhoarc"somethingtous"(anothcrfavoriteformula)
andwholookinforatalkorjusttosit.Muchofthefreetimeofamanandhiswifewill19bepassedatthathearth.Just
stayinginisslilloneofthemostcommonleisure-lime20
A.happensB.professionsC.senseD.nevertheless
E.FashionedF.distanceG.immediateH.usually
I.occupationsJ.preservedK.imitateL.provide
M.thereforeNreserved0.contribute
UnitTwo
Passage2
Flyingoveradesertareainanairplane,twoscientistslookeddownwithtrainedeyesattreesandbushes.Afteranhour'sjj.
oneofthescientistswroteinhisbook,"Lookherefor\2metal."Scientistsinanotherairplane,flyingoveramountain
region,senta13tootherscientistsoniheground,"Goldpossible."Walkingacrosshillyground,fourscientistsreported,
"Thisgroundshouldbesearchedformetals.MFromanairplaneoverahillywastelandascientistsentbackbyradioone
word,"Uranium."
NoneofthescientistshadX-rayeyes:theyhadno14powersforlookingdownbelowtheearth'ssurface.Theywere15
puttingtouseoneofthenewestmethodsof16mineralsintheground-usingtreesandplantsas_17that
certainmineralsmayliebeneaththegroundonwhichthetreesand
plantsaregrowing.
Thisnewestmethodofsearchingformineralsis18onthefactthatmineralsdeepintheearthmay19
thekindofbushesandtreesthatgrowonthesurface.
AtWatsonBarCreek,abrooksixthousandfeethighinthemountainsofBritishColumbia,Canada,arr.ineralsearchgroup
gatheredbagsoftreeseeds.Boxeswerefilledwithsmallbranchesfromthetrees.Rootsweredugandputintoboxes.Each
bagandboxwas20marked.Inascientificlaboratoryihepartsoftheforesttreeswereburnedtoashesandtested.Each
smallpar【wasexaminedtolearnwhether【hereweremineralsinit.__________
A.signsB.sufficientlyC.locatingD.affect
E.merelyF.magicG.hintsH.carefully
I.findingJ.messageK.flightL.probable
M.revealingN.basedO.information
UnitThree
America'smostfamouswomanistheGoddessofLiberty,i.e.theStatueofLiberty.Itwasfirstthoughtofin1865by
EdouarddeLaboulayeanddesignedbyanotherFrenchman,FredericBartoldi.Theywantedto11libertyand
friendship.
Itwashopedthatthemonumentwouldbecompletedby1876whenAmerica12itscentennial.Fundraisingandthe13
ofthestatueinFrancewentslowly.Itwas1885whenthe214cratescontainingthestatuereachedNewYork.
Americanswereinitially14fortheyhadnotraisedthemoneytopayfortheerectionofthebase.Fundraising
bypopularsubscriptionwasbehind15.OnefundraisingmethodusedwastohavepopularAmericanswriteletters
whichwerethensoldinpublic.
Thebaseandstatue,16272feeltall,werecompletedin1886.Froma17standpoint,(hestatueisamarvel.
TheinnerstructurewasdesignedbytheFrenchengineer,AlexandreEiffel.Hisdesignforthestressedcopperskinofthe
statueanticipatedmanyofthe18utilizedinmodernaircraft.
Afteracentury,themonumentbegan(oshowsignsofgettingworsein19JustasFrenchmenhadcreatedtheStatue,
soitwaswithrestoration.
AFrenchmannotedthedecayandFrenchandAmericancraftsmenandcontributionsbroughtabouttherenewalofthe
Statueintimeforitscentennial.Libertyisstill20inFranceandtheUniledStates.
A.ccmplctclyB.measuresC.popularD.together
E.honorF.manufactureG.scheduleH.reward
I.cslebratedJ.principlesK.embarrassedL.technical
M.voluntaryNconditions0.discouraged
UnitFour
SophyBrentcametovisitmenearlyeveryday.Shemademefeeluneasymostofthetime.ShesmokedJJ.andneverused
anashtray.ShefollowedmeintothekitchenwhileImadeteaorcoffeeorsupperand12herselftothechildren'sorange
juice.Shemadeagreathitwithmytwo-year-olddaughterFlora,whowould13aboutherforhoursandrefertoher
lovinglyas"sofa",andshewasalwaystalkingaboutmyhusbandandaskingmewherehewas.
IcouldnotdecidewhyshechosemyJ4,althoughIrealizedthatnobodyelsepaidherverymuchattention.Hersituation
wasverydifficultinthatshewasL5outofdramaschoolandonlynineteen,butbeing16toplayaleadingpartina
companyoffairlyJ_7andexperiencedactors.Theywouldnothavelikedhermuchevenifshehadbeengood,andas,from
allaccounts,shewasnotgoodsotheytookevery]_8torunherdown.IthinkshethoughtthatIwastheonlypersonaround
whowasbothunconnectedwiththetheatreandtolerablyj_9.Toassociatewithmewasnot,atanyrate,tostepdownthe
scale.Andtormypart,althoughIfelttroubledbyherIdidnotdislikeher.Therewassomethinggenuinelyoutstandingin
herpersonality,andshehadsuchphysical20thatwithmeshecouldgetawaywithanything.Shewasnicetohavearound,
likeflowersorabowloffruit.
A.helpedB.smartB.constantlyD.treated
E.requiredF.supremeG.hangH.charm
I.continuallyJ.companyK.opportunityL.distinguished
M.straightN.partner0.disappoinled
UnitFive
Manypeopleoftenenjoyeatingouteitherbeforeorafteravisittothetheatre.However,mostofuswouldratherkeepthe
twoHseparate.Onemanwhothinksthattheycanbesuccessfullycombinedhasnotonlyexpressedhisideasinarecent
book,butalsosetupanestablishmentwherethetheoryisputvery12intopractice.ThemanisPaulThornton,andthe
placeistheHollies,anoldfarmhouse.
WheneverIvisitanewrestaurant,Ifeelthesameexcitementthatkeentheatre-goersmustexperienceor.openingnight.I
hadthisfeelinglastFridayeveningatdusk,asmywifeandIweretakingawalkinthebeautifulgardensoftherestaurant
13afterwehadarrived.Dinnerwasasexcellentaswehadbeen14.Thereisnomenu,fbrMr.Thorntoncreateshismeals
ratherasadirectorproducesaplay.Nevertheless,thevariouscombinationsofJ_5ateachcoursearealways16asifthey
weredonebyiikigiu.HeandliisIcamufhighlyskilledhelpersserve,cuttinduuokllicfood,movingabuulllic"stage"<is
confidentlyas17actors.Themealisasdifferentfromwhatonefindsinordinaryrestaurantsasa18performanceofA
MidsummerNight'sDreamwouldbefromasecond-ratetelevisionproduction.
MayIofferafewwordsofadviceincaseyouarethinkingofpayinghimavisit.Trynottoarrivejustafternoon,asMr.
Thorntondoesnotserveanormallunch.His"brunch"which19thebest20ofatraditional
Englishbreakfast,isservedaroundeleveno'clockandissoplentifulthatlunchisunnecessary.
A.featuresB.shortlyC.potentialD.definitelyE.perfect
F.promotedG.liveH.professionalI.charactersJ.promised
K.choicesL.includesM.pleasuresN.vigorouslyO.substitutions
UnitSix
StudentexpeditionsdoagreatdealofgoodworkontheArcticislandsbutfromtimetotimecausetroubleinthehuts,
probablybecausestudentsarenotfamliarwiththe11ofthelittlewoodenhutsdottedallovertheislandsofthe
Spizbergengroup.
Eachhut12hasaninnerandanouterdoor,shuttersoverthewindows,astoreofwood13upoutside,drychopped
woodinside,utensilsandcutlery,andaboveall,asmallstoreoffood.Allthesethingsmustbecompletelyin14
wheneverthehutisleft.
Itmakesno15ifitisonlythemiddleofJuly.That16hutmaynotbevisitedagainbeforethewinter.Adoorleft
opencanleadeithertosnowfillingupthehuttotheceiling,or17still,windblowingtheroofoff.Unfastenedshutters
leave(hewindowsaneasypreyfbrpolarbears18forfoodandtheresultisagainsnowin(hehut.Theready-choppedwood
isalsovciyimportant.
Atravelervisitingthehutinthemiddhofthedarktimeandperhapsinbadweather,hisfeet,handsandfacebittenbythe
frost,willhavehisdifficultiesdoubledifthewoodhelefthasbeenusedupbyothersandhehadnothingwithwhichto
19afire.
Tenormoreyearsagotherewereenoughhunterstolookaftermostofthehuts,butnowmanybuildingshavebecome
uselessbecausethereisnoonetorepairthemandbecauseof20_______
A.worseB.peculiarC.laidD.light
E.generallyF.orderG.particularH.conventions
I.carelessnessJ.differenceK.builtL.fashions
M.searchingN.ordinarilyO.result
UnitSeven
Mostofustrademoneyforentertainment.Movies,concertsandshowsarcenjoyablebut11.Ifyouthinkthatyoucan't
haveagoodtimewithoutspendingalotofmoney,readon.Alittleresourcefulnessandafewminutesof
newspaper-scanningshouldgiveyousomepleasantsurprises.
Peoplemaybethemostinterestingshowinalargecity.12throughbusystreetsandseewhateverybodyelseisdoing.You
willprobablyseepeoplefromallovertheworld;youwill13seepeopleofeveryage,size,andshape,andyou'llgetafree
fashionshow,too.Window-shoppingisalsoa14sportifthestoresareclosed.
Checkthelistingsinyourneighborhoodpaper.Localcollegesorschoolsoften15thepublictohearaninterestingspeaker
oragood16.Thefilmorconcertseriesatthelocalpubliclibraryprobablywon'tcostyouapenny.Besuretocheck
commercialadvertisementstoo.Afleamarketcanprovidehoursofpleasantlookinground.Perhapsyoucanfindafree
cookingorcrafts£7inadepartmentstore.
Planaheadforsomeactivities.Itisalv/aysmorepleasantnottohavepeopleinfrontofyouinamuseumoratazoo.You
maysavesomemoney,too,sincetheseplacesoften18asideoneortwofree19daysatslowtimesduringtheweek.Make
surethatyouareincludingtheindispensable20thatpeopletravelmilestosee.Ifyoufeelliketakingan
iniereslingwalk,findafreewalking【cur,orplanoneyourself.
A.expensiveB.WonderC.debateD.admission
E.setF.WanderG.safeH.addition
I.valuableJ.disputeK.welcomeL.confidently
M.sightsN.demonstrationO.certainly
UnitEight
Whenapersonfeelslow,blue,ordownintheclumps,itusuallymeanshehasbeenhurt,disappointed,orsaddenedby
somethingthatcausesaconfusedandlistlessfeeling.Thereis11atypeofmusiccalled"theblue",alow,mournful,sad
soundto12theseuniversalhumanfeelings.
Depressionisanothernameforthismood.Feelingdepressedisanormalandnatural13toexperiencesofloss,failure,
andundeservedbadluck.Indeed,ithasbeenpointedoutthatwithoutdepression,wewould14muchoftheworld'sgreat
tragicliterature,music,andart.
Insomecases,however,depressionbecomessomethingmorethanjust15feelingsofbluesorletdown.Alarge
numberofpeoplesufferfromwhatpsychiatristscall"depressiveillness."Depressiveillnessismore16andlastslonger
thancommonlistlessfeelings.Sometimesaserious17ofdepressioncanbeginwiththelossofaloveconeorachangeof
job.Manylimes,invery
18cases,theredoesn'tseemtobeanycircumstanceseriousenoughtohavecausedthedepression.
Somepsychiatristssuggestthatthekeyfeatureindepressionischange.Thepersonbecomesdiftcrcntfromtheway
beforetheonsetofhisdepression.Hemayevenbecometheoppositeofhisusualself.Therearemanyexamples:the
businessmanwhobecomesawanderer,themotherwhowantsto19herchildrenandherself.Insteadotseekingsatisfaction
andpleasure,thedepressedperson20it.__________________________
A.everB.escapeC.intenseD.response
E.avoidsF.evenG.expressH.realization
I.severeJ.lessenK.denseL.period
M.harmN.lackO.normal
UnitNine
Agrowingworldpopulationandthediscoveriesofsciencemay11thispatternofdistributioninthefuture.Asmenslowly
learntomasterdiseases,controlfloods,preventfamines,andstopwars,fewerpeopledieeveiyyear;andin12the
populationoftheworldis13increasing.In1925therewereabout2.000millionpeoplein(heworld:bytheendof(he
centurytheremaywellbeover4,0(X)million.
Whennumbersrisethe14mouthsmustbefed.NewlandsmustbeIboughtundercultivation,orlandalreadyfarmedmade
to15largercrops.Insomeareastheaccessiblelandislargelysointensively16thatitwillbedifficulttomakeitprovide
morefood.Insomeareasthepopulationissodensethatthelandisparceledoutinunitstoo17toallowformuch
improvementinfarmingmethods.Werealargerpartofthisfarmingpopulationdrawnoffintoindustrialoccupations,the
landmightbefarmedmuchmoreproductivelybymodernmethods.
Thereisnowaraceforscience,technology,andindustrytokeepthe18offoodrisingfasterthanthenumberof
peopletobefed.Newstrainsofcropsarebeingdevelopedwhichwillthrivein19climates;irrigationand
dry-farmingmethodsbringpoorlandsundertheplough,damsholdbackthewatersofgreatriversto20water
forthsfieldsinallseasonsandtoprovideelectricpowerfornewindustries;industrialchemistry
providesfertilizerstosuitparticularsoils;aeroplanesspraycropstodestroyinsectsandmanyplant
diseases.
A.ensureB.violentlyC.alterD.harmfulE.
cultivatedF.uniqueG.transplantedH.yieldI.
consequenceJ.outputK.extraL.steadilyM.tinyN.
unfavorableO.produce
UnitTen
IntheUnitedStates,itisnot11totelephonesomeoneveryearlyinthemorning.Ifyoutelephonehimearlyintheday,
whileheisshavingorhavingbreakfast,thetimeofthecallshowsthatthematterisveryimportantandrequiresimmediate
attention.Thesamemeaningisattachedtotelephonecallsmadeafter11:(X)p.m..Ifsomeonereceivesacallduring
sleepinghours,he12it'samatteroflifeanddeath.Thetimechosenforthecall13itsimportance.
In14life,timeplaysaveryimportantpart.IntheU.S.A.,gueststendtofeeltheyarenothighlyregardedifthe15toa
dinnerpartyisextendedonlythreeorfourdaysbefore(hepartydate.Butitisnottrueinallcountries.Inotherareasofthe
world,itmaybeconsideredfoolishtomakeanappointmenttoofarin16becauseplanswhicharcmadeforadatemore
thanaweekawaytendtobeforgotten.Themeaningoftimediffersindifferentpartsoftheworld.Thus,misunderstandings
17betweenpeoplefromculturesthattreattimedifferently.
Promptnessisvalued18inAmericanlife,forexample.Ifpeoplearenetprompt,theymayberegardedasimpoliteornot
fullyresponsible.IntheU.S.noonewouldthinkofkeepingabusiness19waitingforanhour,itwouldbetooimpolite.A
personwhois5minuteslateis20tomakeashort
apology.Ifheislessthan5minuteslate,hewillsayafewwordsofexplanation,though
perhapshewillnotcompleiethesentence._______________________________
A.highlyB.engagementc.customaryD.social
E.informF.invitationG.advanceH.absence
I.heavilyJ.associateK.expectedL.assumes
M.habitualN.ariseO.communicates
UnitEleven
Personalityis,toalargeextent,inherent—A-lypeparents,usuallybringaboutA-typechildren.Buttheenvironmentmust
alsohavea11effect,winceifcompetitionisimportanttotheparentsitislikelytobecomeamajor12inthelivesoftheir
children.
OneplacewherechildrensoakupAcharacteristicsisschool,whichis,byitsverynature,ahighlycompetitiveinstitution.
Toomanyschools13the"winatallcosts"moralstandardandmeasuretheirsuccessbysportingachievements.The
current14formakingchildrencompeteagainsttheirclassmatesoragainsttheclockproducesatwo-layersystem,inwhich
competitiveAtypesseeminsomewaybelter(hantheirB-typefellows.Being15keentowincanhavedangerous
consequences:rememberthatPhcidippidcs,thefirstmarathonrunner,droppeddeadsecondsaftersaying;"cheers,wc
conquer!"
Byfartheworstformofcompetitioninschoolsistheextreme16onexaminations.Itisarareschoolthatallowspupilsto
17onthosethingstheydowell.Themeritsofcompetitionbyexaminationarcsomewhat18,butcompetitioninthecertain
knowledgeoffailureispositivelyharmful.
Obviously,itisneither19nordesirable(hatallAyoungsterschangeintoB's.Theworldneedstypes,and
schoolshaveanimportantdutytotryto20achild'spersonalitytohispossiblefutureemployment.Itistop
management________________________________________________________
A.enoughB.fitC.emphasisD.practical
E.innumerableF.concentrateG.adoptH.questionable
I.profoundJ.factorK.tooL.substance
M.passionN.emotionO.fix
UNIT12
Asthe11oflifecontinuestoincrease,wearefastlosingtheartofrelaxation.Onceyouareinhabitofrushingthroughlife,
beingonthegofrommorningtillnight,itishardtoslowdown.Butrelaxationisessentialforahealthymindandbody.
Stressisanaturalpartofeverydaylifeandthereisnowaytoavoidit.Infact,itisnotthebadthingitisoften12tobe.A
certainamountofstressis13toprovidemotivationandgivepurposetolife.Itisonlywhen(hestressgetsoutofcontrol
thatitcanleadtopoor14andillhealth.
Theamountofstressapersoncan15dependsverymuchontheindividual.Somepeoplearenotafraidofstress,andsuch
charactersare16primematerialformanagerialresponsibilities.Othersloseheartatthefirstsignsof17difficulties.When
exposedtostress,inwhateverform,wereactbothchemicallyandphysically.Infactwcmakechoicebetween"fight"or
"flight"andinmoreprimitivedaysthechoicesmadethedifferencebetweenlifeordeath.Thecriseswemeettodayare
unlikelytobeso18,buthoweverlittlethestress,itinvolvesthesameresponse.Itiswhensuchareactionlastslong,
throughcontinued19tostress,thathealthbecomesendangered.Suchseriousconditionsashighbloodpressureandheart
diseasehaveestablishedlinkswithstress.Sincewecannot20stressfromourlives(itwouldbeunwisetodosoevenifwe
could),weneedtofindwaystodealv/ithit.
A.cancelB.paceC.extremeD.automatically
E.removeF.vitalG.performanceH.supposed
I.rateJ.exposureK.achievementL.unusual
MobviouslyNwithstandOharsh
UnitThirteen
Whatisyourfavoritecolor?Doyoulikeyellow,orange,red?Ifyoudo,youmustbeanoptimist,aleader,anactiveperson
who11life,peopleandexcitement.Doyouprefergreysandblues?Thenyouareprobablyquiet,shy,andyouwouldrather
followthanlead.You12tobeapessimist.Atleast,thisiswhatpsychologiststellus,andtheyshouldknow,becausethey
havebeenseriouslystudyingthemeaningofcolorpreference,aswellastheeffectthatcolorshaveonhumanbeings.They
tellus,amongother13,thatwedonolchooseourfavoritecoloraswegrowup—wearebornwithourpreference.Ifyou
happentolovebrown,youdidso,assoonasyouopenedyoureyes,oratleastassoonasyoucouldseeclearly.
Colorsdo14ourmoods—thereisnodoubtaboutit.Ayellowroommakesmostpeoplefeelmorecheerfulandmore
relaxedihanadarkgreenone;andareddressbringswarmthandcheertothesaddestwinterday.Ontheotherhand,black
is15AblackbridgeovertheThamesRiver,nearLondon,usedtobethe16ofmoresuicidesthananyotherbridgeinthe
area—untilitwasrepaintedgreen.Thenumberofsuicideattemptsimmediatelyfell17;perhapsitwouldhavefalleneven
moreifthebridgehadbeendoneinpinkorbabyblue.
Lightand18colorsmakepeoplenotonlyhappierbutmoreactive.Itis
an19factthatfactoryworkersworkbetter,harder,andhavefewer20when(heirmachinesarepainted
orangeratherthanblackorgrey.________________________________________
A.brightB.sceneC.whollyD.favor
E.factsF.depressingG.accidentsH.interfere
I.establishedJ.incidentsK.disgJustingpL.sharply
M.enjoysN.tend0.influence
UnitFourteen
Womsnarealsounderrepresentedintheadministrationand(hisisbecausetherearesofewwomen11professors.In1985,
RegentBerylMilburnproducedareportblastingtheUniversityofTexasSystemadministrationfornot12women.The
Universitywasratedamongthelowestforthesystem.Ina1587update.Milbum13andpraisedtheprogressthatwasmade
andcalledforevenmore14
Oneofthepositiveresultsfromherstudywasasystem-wideprogramtoinformwomenofavailableadministrativejobs.
CollegeofCommunicationAssociateDean,PatriciaWitherspoon,saiditisimportantthatwomanbe15whenitcomesto
relocatingiftheywantto16intheranks.
Althoughawomanmayfaceachilly17oncampus,manytimesinorderforhertosucceed,shemustriseabovethe
problemsaroundherandconcentrateonherwork.
Untilwomenmakeupagreater18oftheseniorpositionsintheUniversityandallacademia,inequalitieswillexist.
"WomenneedtospendtheirenergiesandtimedoingscholarlyactivitiesthatareimportanthereattheUniversity."
Spirdusosaid."Iftheydothattheywillbe19inthissystem.If(heyspendtheirtimeinlittlegroupsmourningthesexual
discriminationthattheythinkexistshere,ihcyare20wastingvaluablestudytime.“
A.fullB.recalledC.improvementD.rise
E.encouragingF.flexibleG.recognizedH.idly
I.ratioJ.persuadingK.movableL.possibly
M.successfulN.climate0.percentage
UnitFifteen
InOctober1987,theNationalBoardforProfessionalTeachingStandardsbeganitsworktosetnewstandards
ofaccomplishmentfortheteachingprofessionandtoimprovethe11ofeducationavailabletoall
childrenintheUnitedStates.
Teachersare12tostudentsandtheirlearning.Theymustactonthebeliefthatallstudentscanlearn.Theymustrecognize
13differencesintheirstudentsandadjusttheirpractice14.Theymustknowthattheirmissionextendsbeyonddeveloping
thecognitivecapacityoftheirstudents.Theymustbe15withtheirstudents'self-concept,withtheirmotivation,andwith
thedevelopmentofcharacter.
Teachersmustknowthesubjects(heyteachandhowtoteach(hem.Theymust16specializedknowledgeofhowtoconvey
asubjecttostudents.Teachersarcresponsibleformanagingandmonitoringstudentlearning.Theymustcallon17methods
tomeettheirgoals,knowingandbeingableto18avarietyofinstructionalskills.Teachersmustthinksystematicallyabout
theirpracticeandlearnfromexperience,seekingthe19ofothersanddrawingoneducationresearchandscholarshipto
improvetheirpractice.
Asmembersoflearningcommunities,teacherscontributetoschooleffectivenessbycollaboratingwithotherprofessionals.
Theytake___20of
communityresources,cultivatingknowledgeoftheirschool'scommunityasapowerfulresourceforlearning
A.employB.adviceC.quantityD.committed
E.commandF.consultedG.manualH.approximately
I.concernedJ.advantageK.multipleL.accordingly
M.individualN.embrace0.quality
UnitSixteen
Ifyouarelookingforinformation,libraryshelvesareagoodplace(ostart.Butifyouneedup-to-the-minutedataorhave
specializedneeds,youmayfindacomputerizeddatabasemoreuseful,lessexpensive,andlesstime11Adatabase,afileof
informationononesubjectorfamilyofsubjects,canbestoredand12inacomputer'smemory.Thespeedofthecomputer
then13youtorecallanyiteminthisfilealmost14
Thethreemaintypesofdatabasesarestatistical,bibliographic,andfulltext.Statisticaldatabasesstore15amountsof
numericaldata,suchaswageandpriceindexes,censusinformation,foreign16ratesandbondprices.Bibliographic
databasesstorereferencestoandsummariesofarticlesinperiodicalsandnewspapers.Full-textdatabasesofferthecomplex
textsofsuch17asnewspaper,magazine,andjournalarticles.
Thousandsofdatabasesexisttoday,andtheirnumbersaregrowing.Manycompanieshavetheirin-housedatabase,whichis
18toemployeesthroughcomputerterminalsormicrocomputers.Inaddition,severalhundredcommercialdatabasesarc
nowavailabletothe19,withliterallymillionsofitemsofinformationreadilyobtainable.Thesedatabases20specific
fields,suchaslawandfinancialforecasting,orgeneralinformation,suchassporlsandweatherdata.
A.exchangeB.publicC.instantlyD.cover
E.enablesF.consumingG.remainedH.materials
I.hideJ.intensivelyK.vastL.
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