专升本英语（阅读理解）模拟试卷26.pdf

专升本英语（阅读理解）模拟试卷26

一、阅读理解本（题共25题，每题7.0分，共25分。）

Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthe

manwiththeportablecomputerinbusinessclass.Inthepast15years,pilotshave

reportedwellover100incidentsthatcouldhavebeencausedbyelectromagnetic

interference.Thesourceofihisinlerferenceremainsunconfirmed,bulincreasingly、

expertsarepointingh【eblameatportableelectronicdevicesuchasportablecomputers,

radioandcassetteplayersandmobiletelephones.RTC,anorganizationwhichadvises

theaviation航（空）industry,hasrecommendedthatallairlinesban禁（）suchdevices

frombeingusedduringcriticalstagesofflight,particularlytake-offandlanding.Some

expertshavegonefurther,callingforatotalbanduringallflights.Currently,ruleson

usingthesedevicesareleftuptoindividualairlines.ndalthoughsomeairlinesprohibit

passengersfromusingsuchequipmentduringtake-offandlanding,mostarereluctantto

enforceatotalban,giventhatmanypassengerswanttoworkduringflights.The

difficultyispredictinghowelectromagneticfieldsmightaffectanaircraftscomputers.

Expertsknowthatportabledeviceemitradiationwhichaffectsthosewavelengthswhich

aircraftusefornavigationandcommunication.But,becausetheyhavenotbeenableto

reproducetheseeffectsinalaboratory,theyhavenowayofknowingwhetherthe

interferencemightbedangerousornot.Thefactthataircraftmaybevulnerable易（受损

的）tointerferenceraisestheriskthatterroristsmayuseradiosystemsinordertodamage

navigationequipment.sworrying,though,isthepassengerwhocanthearthe

instructionstoturnoffhisradiobecausethemusicstooloud.

1Thepassageismainlyabout.

、anewregulationforallairlines

Bthedefectsofelectronicdevices

C^apossi