搜索
2012年6月大学英语四级阅读全真模拟题（1）Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbusinessclass.Inthelast15years,pilotshavereportedwellover100incidentsthatcouldhavebeencausedbyelectromagneticinterference.Thesourceofthisinterferenceremainsunconfirmed,butincreasingly,expertsarepointingtheblameatportableelectronicdevicesuchasportablecomputers,radioandcassetteplayersandmobiletelephones.(航空)industry,hasrecommendedthatallairlinesban(禁止)suchdevicesfrombeingusedduring“critical”stagesofflight,particularlytake-offandlanding.Someexpertshavegonefurther,callingforatotalbanduringallflights.Currently,rulesonusingthesedevicesareleftuptoindividualairlines.Andalthoughsomeairlinesprohibitpassengersfromusingsuchequipmentduringtake-offandlanding,mostarereluctanttoenforceatotalban,giventhatmanypassengerswanttoworkduringflights.Thedifficultyispredictinghowelectromagneticfieldsmightaffectanaircraft‘scomputers.Expertsknowthatportabledeviceemitradiationwhichaffectsthosewavelengthswhichaircraftusefornavigationandcommunication.But,becausetheyhavenotbeenabletoreproducetheseeffectsinalaboratory,theyhavenowayofknowingwhethertheinterferencemightbedangerousornot.Thefactthataircraftmaybevulnerable(易受损的)tointerferenceraisestheriskthatterroristsmayuseradiosystemsinordertodamagenavigationequipment.Asworrying,though,isthepassengerwhocan‘theartheinstructionstoturnoffhisradiobecausethemusic‘stooloud.21.Thepassageismainlyabout________.A)anewregulationforalairlinesB)thedefectsofelectronicdevicesC)apossiblecauseofaircraftcrashesD)effectivesafetymeasuresforairflight22.Whatissaidabouttheover100aircraftincidentsinthepast15years?A)Theymayhavebeencausedbythedamagetotheradiosystems.B)Theymayhavetakenplaceduringtake-offandlanding.C)Theywereprovedtohavebeencausedbythepassengersportablecomputers.D)Theyweresuspectedtohaveresultedfromelectromagneticinterference.23.Fewairlineswanttoimposeatotalbanontheirpassengersusingelectronicdevicesbecause________.A)theydon‘tbelievethereissuchadangerasradiointerferenceB)theharmfuleffectofelectromagneticinterferenceisyettobeprovedC)mostpassengersrefusetotakeaplanewhichbanstheuseofradioandcassetteplayersD)theyhaveothereffectivesafetymeasurestofallbackon24.Whyisitdifficulttopredictthepossibleeffectsofelectromagneticfieldsonanairplane‘scomputers?A)Becauseitisextremelydangeroustoconductsuchresearchonanairplane.B)Becauseitremainsamysterywhatwavelengthsareliabletobeinterferedwith.C)Becauseresearchscientistshavenotbeenabletoproducethesameeffectsinlabs.D)Becauseexpertslackadequateequipmenttodosuchresearch.考试用书25.Itcanbeinferredfromthepassagethattheauthor________.A)isinfavorofprohibitingpassengers‘useofelectronicdevicescompletelyB)hasoverestimatedthedangerofelectromagneticinterferenceC)hasn‘tformedhisownopiniononthisproblemD)regardsitasunreasonabletoexerciseatotalbanduringflight2012年大学英语四级阅读全真模拟题（2）Theriseofmultinationalcorporations(跨国公司),globalmarketing,newcommunicationstechnologies,andshrinkingculturaldifferenceshaveledtoanunparalleledincreaseinglobalpublicrelationsorPR.Surprisingly,sincemodernPRwaslargelyanAmericaninvention,theU.S.leadershipinpublicrelationsisbeingthreatenedbyPReffortsinothercountries.Tenyearsago,forexample,theworld‘stopfivepublicrelationsagencieswereAmerican-owned.In1991,onlyonewas.TheBritishinparticulararebecomingmoresophisticatedandcreative.ArecentsurveyfoundthatmorethanhalfofallBritishcompaniesincludePRaspartoftheircorporate(公司的)planningactivities,comparedtoaboutone-thirdofU.S.companies.ItmaynotbelongbeforeLondonreplacesNewYorkasthecapitalofPR.WhyisAmericalaggingbehindintheglobalPRrace?First,Americansasawholetendtobefairlyprovincialandtakemoreofaninterestinlocalaffairs.Knowledgeofworldgeography,forexample,hasneverbeenstronginthiscountry.Secondly,AmericanslagbehindtheirEuropeanandAsiancounterparts(相对应的人)inknowingasecondlanguage.Lessthan5percentofBurson—Marshall‘sU.S.employeesknowtwolanguages.OgilvyandMatherhasaboutthesamepercentage.Conversely,someEuropeanfirmshavehalformoreoftheiremployeesfluentinasecondlanguage.Finally,peopleinvolvedinPRabroadtendtokeepaclosereyeoninternationalaffairs.InthefinancialPRarea,forinstance,mostAmericansreadtheWallStreetJournal.Overseas,theircounterpartsreadtheJournalaswellastheFinancialTimesofLondonandTheEconomist,publicationsnotoftenreadinthiscountry.PerhapsthePRindustrymighttakealessonfromTedTurnerofCNN(CableNewsNetwork).Turnerrecentlyannouncedthattheword“foreign”wouldnolongerbeusedonCNNnewsbroadcasts.AccordingtoTurner,globalcommunicationshavemadethenationsoftheworldsointerdependentthatthereisnolongeranysuchthingsasforeign.26.Accordingtothepassage,U.S.leadershipinpublicrelationsisbeingthreatenedbecauseof________.A)anunparalleledincreaseinthenumberofpublicrelationscompaniesB)shrinkingculturaldifferencesandnewcommunicationstechnologies中华考试网(．Examw。com)C)thedecreasingnumberofmultinationalcorporationsintheU.S.D)increasedeffortsofothercountriesinpublicrelations27.LondoncouldsoonreplaceNe