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1、~39~新东方在线[www.koolearn.com]CET4高分班网络课堂电子教材系列(打印版)阅读第一部分阅读理解全真试题Unit1PassageOneThebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbusinessclass.Inthelast15years,pilotshavereportedwellover100incidentsthatcould
2、havebeencausedbyelectromagneticinterference.Thesourceofthisinterferenceremainsunconfirmed,butincreasingly,expertsarepointingtheblameatportableelectronicdevicesuchasportablecomputers,radioandcassetteplayersandmobiletelephones.RTCA,anorganizationwhichadvisesth
3、eaviation(航空)industry,hasrecommendedthatallairlinesban(禁止)suchdevicesfrombeingusedduring“critical”stagesofflight,particularlytake-offandlanding.Someexpertshavegonefurther,callingforatotalbanduringallflights.Currently,rulesonusingthesedevicesareleftuptoindivi
4、dualairlines.Andalthoughsomeairlinesprohibitpassengersfromusingsuchequipmentduringtake-offandlanding,mostarereluctanttoenforceatotalban,giventhatmanypassengerswanttoworkduringflights.Thedifficultyispredictinghowelectromagneticfieldsmightaffectanaircraft‘scom
5、puters.Expertsknowthatportabledeviceemitradiationwhichaffectsthosewavelengthswhichaircraftusefornavigationandcommunication.But,becausetheyhavenotbeenabletoreproducetheseeffectsinalaboratory,theyhavenowayofknowingwhethertheinterferencemightbedangerousornot.Th
6、efactthataircraftmaybevulnerable(易受损的)tointerferenceraisestheriskthatterroristsmayuseradiosystemsinordertodamagenavigationequipment.Asworrying,though,isthepassengerwhocan‘theartheinstructionstoturnoffhisradiobecausethemusic‘stooloud.21.Thepassageismainlyabou
7、t________.A)anewregulationforalairlinesB)thedefectsofelectronicdevicesC)apossiblecauseofaircraftcrashesD)effectivesafetymeasuresforairflight22.Whatissaidabouttheover100aircraftincidentsinthepast15years?A)Theymayhavebeencausedbythedamagetotheradiosystems.B)Th
8、eymayhavetakenplaceduringtake-offandlanding.C)Theywereprovedtohavebeencausedbythepassengersportablecomputers.D)Theyweresuspectedtohaveresultedfromelectromagneticinterference.23.Fewairlineswantto
