CET4备考-四级阅读真题完全解析(3).docx

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CET4备考:四级阅读真题完全解析(3)

Questions31to35arebasedonthefollowingpassage.Speedingoffinastolencar,thethiefthinkshehasgotagreatcatch.Butheisinforanunwelcomesurprise.Thecarisfittedwitharemoteimmobiliser(锁止器),andaradiosignalfromacontrolcentremilesawaywillensurethatoncethethiefswitchestheengineoff,hewillnotbeabletostartitagain.Theideagoeslikethis.Acontrolboxfittedtothecarcontainsamini-cellphone,amicro-processorandmemory,andaGPS(全球定位系统)satellitepositioningreceiver.Ifthecarisstolen,acodedcellphonesignalwilltellthecontrolcentretoblockthevehicle'senginemanagementsystemandpreventtheenginebeingrestarted.IntheUK,asetoftechnicalfixesisalreadymakinglifeharderforcarthieves.'Thepatternofvehiclecrimehaschanged,'saysMartynRandall,asecurityexpert.Hesaysitwouldonlytakehimafewminutestoteachapersonhowtostealacar,usingabareminimumoftools.Butonlyifthecarismorethan10yearsold.Moderncarsarefartoughertosteal,astheirenginemanagementcomputerwon'tallowthemtostartunlesstheyreceiveauniqueIDcodebeamedoutbytheignition(点火)key.IntheUK,technologieslikethishavehelpedachievea31%dropinvehicle-relatedcrimesince1997.Butdeterminedcriminalsarestillmanagingtofindotherwaystostealcars,oftenbygettingboldoftheowner'skeys.Andkeytheftisresponsiblefor40%ofthetheftsofvehiclesfittedwithatrackingsystem.Ifthecartravels100metreswithoutthedriverconfirmingtheirID,thesystemwillsendasignaltoanoperationscentrethatithasbeenstolen.ThehundredmetresminimumavoidsfalsealarmsduetoinaccuraciesintheGPSsignal.Staffatthecentrewillthencontacttheownertoconfirmthatthecarreallyismissing,andkeeppoliceinformedofthevehicle'smovementsviathecar'sGPSunit.31.What'sthefunctionoftheremoteimmobilizerfittedtoacar?A)Tohelpthepolicemakeasurpriseattackonthecarthief.B)Toallowthecartolockautomaticallywhenstolen.C)Topreventthecarthieffromrestartingitonceitstops.D)Topreventcartheftbysendingaradiosignaltothecarowner.32.Bysaying"Thepatternofvehiclecrimehaschanged"(Lines1-2.Para.3),MartynRandallsuggeststhat________.