高三英語閱讀理解專練(15篇)蘇教版

高三英語閱讀理解專練(15篇)AOneofthemostsuccessfulsingersofthetwentiethcentury,EllaFitzgeraldhasmadeseveraldifferentstylesherown.ShewasborninVirginiabutwasbroughtupinanorphanageinYonkers,UnlikeBessieSmith,EllaFitzgeraldtaughtherselfthesentimentalmusicsopopularinthe1930’s------songslike“MyHeartBelongstoDaddy”-----andherrecordingsbecamebest-sellers.Duringthe1940’sshedevelopedherown“scatsinging”----abreathless,nonsense---syllablestyle----forsongslike“FlyingHome”and“LadyBeGood.”EllaFitzgeraldwastheperfectmusicalpartnerforherfriend,thetrumpeterLouisArmstrong,matchinghiminwarmthandartistry.“Ijustlikemusic,period,”shesaid.“Tome,it’sastory.There’sonlyonethingbetterthansinging….It’smoresinging.”1.Whatdoesthepassagemainlydiscuss?A.AcomparisonofEllaFitzgeraldandBessieSmith.B.ThemusicalcareerofEllaFitzgerald.C.EllaFitzgerald’searlychildhood.D.EllaFitzgerald’smostrecentrecordings.2.Theunderlinedword“spotted”means______.A.noticedB.broughtupC.employedD.recognized3.WhatdoesthepassageimplyaboutEllaFitzgeraldandLouisArmstrong?A.Theywerethefoundersof“scatsinging”.B.Theyplayedthesamemusicalinstruments.C.Theyperformedwelltogether.D.Theywereamarriedcouple.BFamilieshavealwayschanged.Forinstance,oncethefamilywastheworld.Inotherwords,atonetimeeverythingapersondidtookplacewithinthefamily.Thefamilywasachild’sonlyschool.Oneworshipedonlywithinthefamily.Therulessetupbythefamilyweretheonlylawsonehadtoobey,andthefamilywastheonlymeansonehadtosettleadispute.Thefamilyisstillthe“world’insomecultures.Butinmanycultures,theseformerfunctionsofthefamilyhavelargelybeentakenoverbyotherinstitutions,suchasschools,churches,andgovernments.Inthepast,familieschangedinotherways.Somescientistsbelievethatwhenpeopleobtainedfoodbyhuntinganimalsandgatheringrootsandplants,thenuclearfamilywastherule.Thefamilyhadtobesmallinordertomovearoundandliveofftheland.Whenpeoplesettledinoneplaceandbegantofarmtoobtainfood,theyfoundthattheyneededmorehandstodothework.Theextendedfamilydevelopedinsomecultures.Nowinadditiontotheirchildren,peoplelivedtogetherwiththeirparentsandevengrandparents.Howarefamilieschangingtoday?Thenumberofnuclearfamiliesseemstobeincreasingeverywhereintheworld.Thenumberofextendedfamiliesisdeclining.Onereasonforthisseemstobethatinmanyculturestodaypeopleareleavingfarmsandvillagestofindjobsinthecity.Extendedfamiliesarehardtomaintainwhenpeoplehavetobefreetomoveinordertofindwork.4.Inmanyculturestoday,__________.A.thefamilyistheworldB.thefamilyisnotaninstitution.C.thefamilydoesnothaveanyfunctions.D.thefamilyhaslostmanyofthefunctionsitusedtohave.5.Thenuclearfamilywastherulebecause_________.A.thefamilyhadtomovearoundtofindenoughfood.B.peopledidn’tknowmanywaysofhuntinganimals.C.Peopleneededmanyhandstodofarming.D.theextendedfamilyhadnotbeeninventedyet.6.Thereasonwhymanypeopleareleavingfarmstofindjobsinthecityis________.A.thattherearemoreandmorenuclearfamiliesintheworld.B.thatextendedfamiliesarehardtomaintain.C.thatpeopledonotliketosettledown.D.notstatedinabovearticle.7.Whichofthefollowingistrue?A.Althoughthenuclearfamilydevelopedbeforetheextendedfamily,thelatterisgainingmoreandmorepopularityeverywhereintheworld.B.themostimportantreasonwhypeopleareleavingvillagesisthattheydonotenjoylivingtogetherwiththeirparentsorgrandparents.C.Differenttypesoffamilieshavedevelopedasdifferentwaysoflifeareaccepted.D.Familieschangebecausetidesandfashionsalwayschange.CIn1957adoctorinSingaporenoticedthathospitalsweretreatinganunusualnumberofinfluenza-likecases.Influenzaissometimescalled‘flu’ora‘badcold’.Hetooksamplesfromthethroatsofpatientsandinhishospitalwasabletofindthevirusofthisinfluenza.Therewerethreemaintypesoftheinfluenzavirus.ThemostimportantofthesearetypeAandB,eachofthemhavingseveralsubgroups.WiththeinstrumentsatthehospitalthedoctorrecognizedthattheoutbreakwasduetoavirusingroupA,buthedidnotknowthesubgroup.ThenhereportedtheoutbreaktotheWorldHealthOrganizationinGeneva.W.H.O.publishedtheimportantnewsalongsidereportsofasimilaroutbreakinHongKong,whereabout15-20%ofthepopulationhadbecomeill.AssoonastheLondondoctorsreceivedthepackageofthroatsamples,doctorsbeganthestandardtests.Theyfoundthatbyreproducingitselfwithveryhighspeed,thevirushadgrownmorethanamilliontimeswithintwodays.Continuingtheircarefultests,thedoctorscheckedtheeffectofdrugsagainstalltheknownsungroupsofvirustypeA.noneofthemgaveanyprotection.This,then,wassomethingnew,anewinfluenzavirus,againstwhichthepeopleoftheworldhadnohelpwhatever.Havingfoundthevirustheywereworkingwith,thetwodoctorsnowdroppeditintothenosesofsomespeciallyselectedanimals,whichgetinfluenzamuchashumanbeingsdo.Inashorttimetheusualsignsofthediseaseappeared.Theseexperimentsprovedthatthenewviruswaseasytocatch,butthatitwasnotakiller.Scientists,likethegeneralpublic,callitsimplyAsianflu.Thefirstdiscoveryofthevirus,however,wasmadeinChinabeforethediseasehadappearedinothercountries.VariousreportsshowedthattheinfluenzaoutbreakstartedinChina,probablyinFebruaryof1957.bythemiddleofMarchithadspreadalloverChina.TheviruswasfoundbyChinesedoctorsearlyinMarch.ButChinaisnotamemberoftheWorldHealthOrganizationandthereforedoesnotreportoutbreaksofdiseasetoit.Notuntiltwomonthslater,whentravellerscarriedthevirusintoHangKong,fromwhereitspreadtoSingapore,didthenewsoftheoutbreakreachtherestoftheworld.Bythistimeitwaswellstartedonitswayaroundtheworld.Thereafter,W.H.O.’sWeeklyReportsdescribedthesteadyspreadofthisgreatvirusoutbreak,whichwithinfourmonthssweptthrougheverycontinent.8.thedoctorinSingaporeperformedavaluableserviceby______.A.findingthesubgroupofthevirus.B.developingacure.C.keepinghispatientsapartfromothers.D.reportingtheoutbreaktoGeneva.9.Oneinterestingthingaboutthevirusinthestorywasthatit__.A.wasespeciallyweak.B.wassimilartootherviruses.C.couldreproducewithgreatspeed.D.hadsamplesfrozenandpackedindryice.10.Theexperimentsingivingthevirustoanimalsprovedthatthistypeofinfluenzawaseasytocatch__________.A.butwasnotdeadly.B.andhadrathermildeffects.C.andcouldpossiblycausesdeath.D.anddidnothavetheusualsigns.11.Inordertokeeptrackofadiseasesuchasinfluenza,W.H.O.musthave________.A.highlytrainedexperts.B.co-operationfromeverydoctor.C.goodreportingservices.D.timetostudythefacts.12.Onethingnecessaryfordiscoveringinfluenzaoutbreakis__.A.doctorsandhospitalservices.B.drugstofightthedisease.C.theUnitedNations.D.sickChinese.DItistruethatasasocialorganizationmovesfromthesimpletothecomplex,sodoestheorganizationthroughwhichiteducatesitschildren.Growthandchangearevitalifeducationistomeetnewneedsanddemands.Inaverysimplesocialorderitmaysuffice(足夠)tohavetheparentscarryontheeducationoftheirchildren.However,aswillbeshownlaterinmoredetail,suchamethodmaybecomeentirelyuntenable(站不住腳的),andspecialindividualsareentrusted(委交)withthetask.Thesemaybehiredprivatelyatfirst,butsoonthesocialgroup----thechurch,village,andthelike----willberesponsibleforeducation.Eventually,specialtrainingisrequiredforthosewhodotheteaching,andanagencytocontrolthistrainingisneeded.Thustheinfluenceoflocalgovernmentunit,suchasthetown,township,andlaterthestateortheprovince,becomesnecessary.Itwasgenerallyconsideredsimplertouseasaunitthealreadyexistinglocalunit.13.Theclosestrestatement(重新敘述)ofthefirstsentenceis___.A.Themorecomplexasocialorganizationbecomes,themorecomplextheeducationalsystembecomes.B.Thecomplexityofasocialorganizationdependsonthecomplexityoftheeducationalsystem.C.Socialorganizationsaretrulyascomplexastheyneedtobeforeducationalpurposes.D.Oursocietymustbecomplexifwewantoureducationsystemtoserveourchildren’seducationalrequirements.14.Thewriterwouldprobablyarguefor_______.A.moreparentalinfluenceineducation.B.aneducationalsystemwhichtakessocialcomplexityintoaccount.C.strictstatecontrolofeducation.D.morespecialtrainingforteachers.15.Themethodwhichtheauthorsaysmightbecomeentirelyuntenableis_____.A.themethodofsocialorganization.B.parentaleducationofchildren.C.asimplesocialorder.D.theentrustmentofeducationtospecialindividuals.16.Theauthorpromisestoexplain_________.A.thenecessityofthelocalgovernmentalunit.B.whyitiseasiertousethegovernmenttocontroleducation.C.theresponsibilityofthesocialgroup.D.whyparentsshouldnotteachtheirchildren.EComputerpeopletalkalotabouttheneedforotherpeopletobecome“computer-literate”.Butnotallexpertsagreethatthisisagoodidea.Onepioneerinparticular,whodisagreesinDavidTebbutt,thefounderofComputertownUK.Althoughmanypeopleseethisassuccessfulattempttobringpeopleclosertothecomputer,Daviddoesnotseeitthatway.HesaysthatComputertownUKwasformedforjusttheoppositereason,tobringcomputerstopeopleandmakethem“people-literate”.DavidTebbettthinksComputertownsaremostsuccessfulwhentiedtoacomputerclubbutheinsiststhereisanimportantdifferencebetweenthetwo.Theclubsareforpeoplewhohavesomecomputerknowledgealready.Thisfrightensawaynon-experts,whoarehappiergoingtoComputertownswheretherearecomputersforthemtoexperimenton,withexpertstoencouragethemandansweranyquestionstheyhave.Theyarenottoldwhattodo,theyfindout.Thecomputerexpertshavetolearnnottotellpeopleaboutcomputersbuthavetobeabletotellpeoplequestionspeopleask.Peopledon’thavetolearncomputerterms(術(shù)語),buttheexpertsarebecoming“people-literate”.17.WhichofthefollowingisDavidTebbutt’sideaontherelationshipbetweenpeopleandcomputers?A.Computerlearningshouldbemadeeasier.B.Thereshouldbemorecomputerclubsforexperts.C.Peopleshouldworkhardertomastercomputeruse.D.Computersshouldbemadecheapersothatpeoplecanaffordthem.18.Wecaninferfromthetextthat“computer-literate”means________.A.beingabletoaffordacomputer.B.beingabletowritecomputerprograms.C.workingwiththecomputerandfindingoutitsvalue.D.understandingthecomputerandknowinghowtouseit.19.Theunderlinedword“it”inthesecondparagraphreferstotheideathatComputertowns__________.A.helptosetupmorecomputerclubs.B.bringpeopletolearntousecomputers.C.bringmoreexpertstoworktogether.D.helptosellcomputerstothepublic.20.DavidTebbettstartedComputertownUKwiththepurposeof________.A.makingbetteruseofcomputerexperts.B.increasingcomputerprograms.C.increasingcomputersales.D.popularisingcomputers.FCatsarecreaturesofhabit.Theyliketogotosleepaboutthesametimeeverydayandforacertainlengthoftime.Theyseemtohaveanaturalclockinsidethemthattellsthemwhentosleep.Catsincreasetheirregularsleepwithoccasionalcatnaps（打盹）.Someexpertsfeelthathumanscouldalsobenefitfromthishabit.Catnapshelptobuildupenergyinthebody.Theyarealsoagoodwaytogetridoftrouble!Sincecatshavethesamemoods（心情）ashumans,someexpertsbelievethatpeoplecanimprovetheirmoods.Peoplemightbecomehappier.Anumberoffamouspeoplehavecopiedcatsbytakingcatnapsduringtheday.Thenapswouldusuallylastfrom15to30minutes.WinstonChurchilltookcatnaps.SodidPresidentsHarryTruman,JohnF.Kennedy,andLyndonB.Johnson.Thesefamousmenwereknownfortheirenergy.Theywerealsoabletoworklonghours,oftenintothenight.Nappingwastheirsecret.21．Fromthisselectionweknowthatcats________.A.donothaveregularsleepB.haveoccasionalsleepaswellasnapseverydayC.takenapstoaddtotheirregularsleepD.takenapswhentheyarenothappy22．Takingcatnaps________.A.willmakeapersonlazyandtiredB.isabadhabitC.willmakepeoplefeelbetterD.canhelppeopletobecomefamous23．WhichofthefollowingstatementsisNOTtrue?________.A.PeopleshouldtaketheirnapssecretlyB.CatshavethesamemoodsaspeopleC.SomefamouspeopletakecatnapsD.Somepeoplehavefullenergyaftertheytakecatnaps24．Napsusuallylast________.A.threehoursB.lessthanhalfanhourC.forty-fiveminutesD.fifty-fiveminutes25．Thisselectionwasprobablywrittento________.A.showhowlazycatsareB.talkaboutthehabitsofcatsC.tellaboutfamouspeopleandtheirhabitsD.persuadepeopletotakenapsGThereisanendlesssupplyofstoriesaboutsleepwalkers（夢游者）.Personshavebeensaidtoclimbonroofs,solvemathematicalproblems,writemusic,walkthroughwindows,anddomurderintheirsleep.InRevere,AttheUniversityofIowa,astudentwasreportedtohavethehabitofgettingupinthemiddleofthenightandwalkingthreequartersofamiletotheIowaRiver.Hewouldtakeaswimandthengobacktohisroomtobed.AnexpertonsleepinAmericaclaims（聲稱）thathehasneverseenasleepwalker.Heissaidtoknowmoreaboutsleepthananyothermanalive,andduringthelastthirty-fiveyearshehaslostalotofsleepwatchingpeoplesleep.Hesays,“Ofcourse,IknowthattherearesleepwalkersbecauseIhavereadabouttheminthenewspapers.Butnoneofmysleeperseverwalked,andifIweretoadvertiseforsleepwalkersforanexperiment,IdoubtwhetherIcouldgetmanytakers.”Sleepwalking,however,isascientificreality.Itisoneofthosestrangethingsthatsometimeslookquitelikethefantastic（怪誕的）.Doctorssaythatsleepwalkingismuchmorecommonthanisgenerallysupposed.Manysleepwalkersdonottrytofindhelpandareneverrecorded.26．Generallyspeaking,sleepwalkersaretheonesthat________.A.canclimbonroofsB.canwalkthroughwindowsC.candofantasticthingsduringtheirsleepD.canwalkinahalf-awakestate27．Itwasreportedthataboy________.A.wasfoundonastrangesofa,tellinghowhehadgotthereB.sleptinhisownroombutwokeupinastrangeroomC.losthiswayfivehoursafterhelefthomeD.wassearchedforbypolicemenforhelosthisway28．Thepassagementionsacollegestudentwhogotintothehabitof________.A.gettingupinthemiddleofthenightandwalkingoutB.walkingthreequartersofamileeverydayC.swimmingintheIowaRiverbeforegoingtobedD.walkingaboutbeforehewenttobed29．AnAmericanexpertknowsmoreaboutsleepthananyothermanalive,________.A.becausehecangetmanytakersforhisexperimentB.becausehehashadtroublewithsleepfor30yearsC.buthesayshehasneverseensleeperswalkD.buthehasnobodytosleeptogetherwithhim30．Peoplethinksleepwalkingisnothingbutoneofthefantasticthingswithoutanyexplanation.Why?A.Itissocommonthatitneedn’tberecorded.B.Scientiststakenointerestinit.C.Doctorsdon’twanttocareaboutit.D.Norecordsaboutithavebeenmade.HSomepeopleareluckyenoughtobebornwithagoodsenseofdirectionandeveniftheyhaveonlyvisitedaplaceonce,theywillbeabletofinditagainyearslater.IamoneofthoseunfortunatepeoplewhohavepoorsenseofdirectionandImayhavevisitedaplacetimeaftertimebutIstillgetlostonmywaythere.WhenIwasyoungIwassoshythatIneverdaredaskcompletestrangersthewayandsoIusedtowanderroundincirclesandhopethatbysomechanceIwouldgettothespotIwasheadingfor.Iamnolongertooshytoaskpeoplefordirection,butIoftenreceiverepliesthatpuzzleme.Oftenpeopledonotliketoadmitthattheydidn’tknowtheirhometownandwillinsistontellingyoutheway,eveniftheydonotknowit;others,whoareanxioustoprovethattheyknowtheirhometownverywell,willgiveyoualonglistofdirectionswhichyoucannotpossiblyhopetoremember,andstillothersdonotseemtobeabletotellbetweentheirleftandtheirrightandyoufindintheendthatyouaregoingintheoppositedirectiontothatinwhichyoushouldbegoing.Ifanyoneeverasksmethewaytosomewhere,IalwaystellthemIamastrangertothetowninordertoavoidgivingthemwrongdirectionbuteventhiscanhaveembarrassingresults.OnceIwasonmywaytoworkwhenIwasstoppedbyamanwhoaskedmeifIwoulddirecthimthewaytotheSunlightImaginemyembarrassmentwhenmysecretaryshowedintheverymanwhohadaskedfordirectionsofmyofficeandhisastonishmentwhenherecognizedmeasthepersonhehadasked.31.Whatisthewritergoingtodowhensomeoneaskshimfordirection?A.Hewilldirecttherightwaytothepersonwillingly.B.Hewillreplytoitbythemeansofbeingastrangertothetown.C.Hewillgivetheverypersonlonglistofdirection.D.Heisgoingtoshowthemananoppositedirection.32.Whydidthewriterconsiderhimselftobeanunluckydog?A.Becauseofhispoorsenseofdirection.B.Becausehealwaysforgetthewaytohome.C.Becausehedidnothaveanyfriend.D.Becauseheusedtobeshyanddarednotaskotherstheway.33.Howdidthevisitorfeelwhenhewasshowedintotheveryroom?A.Hefeltstrange.B.Hefeltembarrassed.C.Hefeltverysad.D.Hefeltastonished.34.Whoshowedtherightwaytotheintervieweeaccordingtothepassage?A.Someonewedon’tknow.B.Thewriterdiditforhimself.C.Thesecretarydidso.D.Awarm-heartedoldladydidsuchathing.IIfellinlovewithEnglandbecauseitwasquaint(古雅)—allthoselittlehouses,lookingterriblyold-fashionedbutnice,likedolls’houses.Ilovedthecountrysideandthepubs,andIlovedLondon.I’veslightlychangedmymindafterseventeenyearsbecauseIthinkit’sanuglytownnow.Thingshavechanged.Foreverybody,Englandmeantgentlemen,fairplay,andgoodmanners.Thefairplayisgoing,unfortunately,andsoarethegentlemanlyattitudesandgoodmanners—peopleshutdoorsheavilyinyourfaceandpolitenessisdisappearing.Iregretthattherearesofewcomfortablemeetingplaces.You’reforcedtoliveindoors.InParisIgooutmuchmore,torestaurantsandnightclubs.Tomeetfriendshereitusuallyhastobeinapub,anditcanbedifficulttogotherealoneasawoman.Thecafesarenotterriblynice.Asawoman,Ifeelunsafehere.IspendabombontaxisbecauseIwillnottakepublictransportafter10p.m.Iusedtouseit,butnowI’mafraid.Theideaoffamilyseemstobemoreorlessnon-existentinEngland.Myfamilyiswellunitedandthat’stypicallyFrench.InMiddlesexIhadaneighborwhois82now.Hisfamilyonlylivedtwomilesaway,butItookhimtoFranceforChristmasoncebecausehewasalwaysalone.35.Thewriterdoesn’tlikeLondonbecauseshe______. A.isnotusedtothelifetherenow B.haslivedthereforseventeenyears C.preferstoliveinanold-fashionedhouse D.hastobepolitetoeveryoneshemeetsthere36.WheredopeopleusuallymeettheirfriendsinEngland? A.Inacafe.B.Inarestaurant.C.Inanightclub.D.Inapub.37.Theunderlinedpart“it”(inPara.4)refersto______. A.ataxiB.themoney C.abomb D.publictransport38.ThewritertookherneighbortoFranceforChristmasbecausehe__.A.feltlonelyinEngland B.hadneverbeentoFranceC.wasfromatypicalFrenchfamily D.didn'tliketheBritishideaoffamilyJAlmosteveryonelikestoeatapples.Applesgrowinnearlyeverypartoftheworld.TheUnitedStatesproducesmoreapplesthananyothercountryexceptFrance.ThestatesofWashingtonandNewYorkgrowthemostapples.NewYorkisontheeastcoastandWashingtonisonthewestnearCanada,Applesarered,yelloworgreen.TheyareverypopularintheUnitedStates.Manypeopleliketocarryapplestoworkortoschooltoeatwiththeirlunches.MostAmericanpeopleareoftentoobusyortootiredtocookdinner,sotheyoftenhavetheirdinnersverysimply.ApplejuiceisalsoapopulardrinkandapplepieisthefavoritedessertformanyAmericans.ThestateofWashingtonisproudofitsapples.Thetreesthereproducenearlyfivebillionappleseveryyear—oneappleforeveryman,womanandchildinthewholeworld.39．Whatcanweknowfromtheunderlinedsentence?A.Americanapplestastegood.B.WecanseeappleseverywhereinAmerica.C.Americansliketoeatapples.D.Americansregardapplesastheirbestfood.40．Fromthispassage,weallknow________.A.FranceproducesthemostapplesintheworldB.therearemoreapplesinAmericathaninFranceC.theapplesinFrancearebetterthanthoseinAmericaD.appletreesareeasytogrowinNewYorkKHealthyfoodisageneralterm(術(shù)語)appliedtoallkindsoffoodthatisconsideredhealthierthanthetypesoffoodsoldinsupermarkets.Forexample,wholegrains,driedbeans,andcornoilarehealthfood.Anarrowerclassification(分類)ofhealthyfoodisnaturalfood.Thistermisusedtodistinguish(區(qū)分)betweentypesofthesamefood.Rawhoneyisanaturalsweetener,whilerefined(提煉的)sugarisnot.Freshfruitisanaturalfood,butcannedfruit,withsugarsandotheradditives(添加劑),isnot.Themostexacttermofallandthenarrowestclassificationwithinhealthfoodthathasbeengrownonaparticularkindoffarm.Fruitsandvegetablethataregrowningardens,thataretreatedonlywithorganicfertilizers,thatarenotsprayedwithpoisonousinsecticides(殺蟲劑),andthatarenotrefinedafterharvest,areorganicfood.Meat,fish,dairyandpoultryproductsfromanimalsthatarefedonlyonorganically-grownfoodandthatarenotinjectedwithhormones(激素)areorganicfood.Inchoosingthetypeoffoodyoueat,then,youhavebasicallytwochoices:inorganic,processed(加工)food,ororganic,unprocessedfood.Awisedecisionshouldincludestudyofthereasonwhyprocessedfoodcontainschemicals,someofwhichareprovedtobepoisonousandthatvitamincontentisgreatlyreducedinprocessedfood.Breadistypicallyusedbyhealthyfoodsupportersasanexampleofaprocessedfood.First,theseedsfromwhichthegrainisgrownaretreatedwithachemicalthatisextremelyharmful.Later,thegrainissprayedwithanumberofverydeadlyinsecticides.Afterthegrainhasbeenmadeintoflour,itismadewhitewithanotherchemicalthatisalsopoisonous.Next,adoughconditionerisaddedalongwithasoftener.Theconditionerandsoftenerarepoisonous,andinfact,thesoftenerhassickenedandkilledexperimentalanimals.Averypoisonousantifungalcompound,isaddedtokeepthebreadfromgettingmoldy(發(fā)霉的).Otherfoodfromthesupermarketwouldshowasimilarpatternofprocessingandpreserving(保存).Yousee,webuyourfoodonthebasisofsmell,colorandtexture,insteadofvitamincontent,andmanufacturersgiveuswhatwewant,evenifitispoisonous.Thealternative?Eathealthfoods,preferablytheorganicvariety.41.Whatisthepassagemainlyabout?A.Healthyfood.B.Theprocessingofbread.C.Processedfood.D.Poisonous.42.Whatdoalloftheadditivesinbreadhaveincommon?A.Theyareallusedtokeepthebreadfromgettingmoldy.B.Theyareallpoisonous.C.Theyareallorganic.D.Theyallhaveallkilledlaboratoryanimals.43.Whathappenstofoodwhenitisprocessed?A.Thebasiccontentremainsthesame.B.Vitaminisnotavailableafterprocessing.C.Thevitamincontentincreasesabit.D.Thevitamincontentisgreatlyreduced.44.Wenormallybuyfoodonthebasis.A.organicvarietyB.beautyC.refinedcontentsD.colorandtextureLAbranchofcomputersciencecalledartificialintelligence(人工智能)usesprogramsbyusinghumanknowledgeandexperience.Artificialintelligencesystemsarealsocalledexpertsystems,whichenablecomputersprogrammedwithgreatamountsofinformationto“think”aboutmanypossibilitiessuchasdiseasesthatcertainsymptoms(癥狀)couldindicateandmakeadecisionforthetreatment.Computersareusedinteachingaswell.Programsthatperformcomputer-aidedinstruction(CAI計(jì)算機(jī)協(xié)助教學(xué))aredesignedtohelpstudentsatalllevels,fromelementaryschooltotheuniversitylevel.Thestudentsitsatacomputerterminal(終端).Theterminal’sscreendisplaysaquestionforthestudenttoanswer.Iftheansweriswrongorincomplete,thecomputermayaskthestudenttotryagain.Itthenmaysupplythecorrectanswerandanexplanation.CAIisalsousedinsomeadulteducationprogramsandaspartoftheemployee-trainingprogramsofsomebusinesscompanies.Oneofthemostimportantusesofcomputersistocommunicateinformationoverlongdistances.Theycansendinformationtoeachotherovertelephonelines.Asaresult,computerskeepbanks,newspapers,andotherinstitutessuppliedwithup-to-the-minuteinformation.Acomputernetworksallowpeopletocommunicatebyusingelectronicmail—adocumenttypedintoonecomputerand“sent”toanother.Suchdocumentsgenerallytravelinonlyafewminutes,eveniftheyarebeingsentoveralongdistance.Thecomputer’sabilitytoshareinformationwithcomputersoveranetworklinkedbytelephonelinesisamajorrevolutionontelecommunications(電信).TheInternet,aninternationalnetworkofcomputernetworks,hasspreadoutsincetheearly1990’s.TheInternetbeganasaUSnetworkofscientificandmilitarycomputersinth