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1、CET4阅读高分班电子教材主讲：陈科欢迎使用新东方在线电子教材教材说明：本电子教材word文档下面的页码跟教材完全一样，学员只需根据老师说的多少页找到相应的页面学习即可。请提前预习、认真学习、及时复习，祝广大学子考试取得成功！136第一部分阅读理解全真试题Unit1PartIIReadingComprehension(35minutes)Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinish
2、edstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.PassageOneQuestions21to25arebasedonthefollowingpassage.Thebiggestsafetythreatfacing
3、airlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbusinessclass.Inthelast15years,pilotshavereportedwellover100incidentsthatcouldhavebeencausedbyelectromagneticinterference.Thesourceofthisinterferenceremainsunconfirmed,butincreasing
4、ly,expertsarepointingtheblameatportableelectronicdevicesuchasportablecomputers,radioandcassetteplayersandmobiletelephones.RTCA,anorganizationwhichadvisestheaviation(航空)industry,hasrecommendedthatallairlinesban(禁止)suchdevicesfrombeingusedduring“critical”st
5、agesofflight,particularlytake-offandlanding.Someexpertshavegonefurther,callingforatotalbanduringallflights.Currently,rulesonusingthesedevicesareleftuptoindividualairlines.Andalthoughsomeairlinesprohibitpassengersfromusingsuchequipmentduringtake-offandland
6、ing,mostarereluctanttoenforceatotalban,giventhatmanypassengerswanttoworkduringflights.Thedifficultyispredictinghowelectromagneticfieldsmightaffectanaircraft’scomputers.Expertsknowthatportabledeviceemitradiationwhichaffectsthosewavelengthswhichaircraftusef
7、ornavigationandcommunication.But,becausetheyhavenotbeenabletoreproducetheseeffectsinalaboratory,theyhavenowayofknowingwhethertheinterferencemightbedangerousornot.Thefactthataircraftmaybevulnerable(易受损的)tointerferenceraisestheriskthatterroristsmayuseradios
8、ystemsinordertodamagenavigationequipment.Asworrying,though,isthepassengerwhocan’theartheinstructionstoturnoffhisradiobecausethemusic’stooloud.13621.Thepassageismainlyabout________.A)anewregulationforalairlinesB)thed
