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1、高考英语练习（二）II.GrammarandVocabularySectionADirectionsAfterreadingthepassagesbelowfillintheblankstomakethepassagescoherentandgrammaticallycorrect.Fortheblankswdthagivenword,fillineachblankwiththeproperformofthegivenwordfor.Theotherblanks,useonewordthatbestfitseachblank.ATheb
2、iggestsafetythreatfacingairlinestodaymaynotbeamanwithagunbutthemanwiththeportablecomputerinbusinessclass.Inthelast25years,pilotshavereportedwellover200incidentsthat(25)havebeencausedbyelectromagneticinterference・Unclear(26)thesourceofthisinterferenceremains,increasingly,
3、expertshavefoundoutthatportableelectronicdevicessuchasportablecomputers,radioandmobiletelephonesare(27)(blame).RTCA,anorganizationwhichadvisesaviationindustry,hassuggestedthatallairlinesbansuchdevicesfrom(28)(use)during"key"stagesofflight,particularlytake-offandlanding・S
4、omeexpertshavegone(29)(far),callingforatotalbanduringallflights・Nowadays,rulesonusingthesedevicesareleftuptoairlines.Andalthoughsomeairlinesbanpassengersfromusingsuchequipmentduringtake-offandlanding,mostarenotwillingtoenforceatotalban,ifmanypassengerswanttoworkduringfli
5、ghts・Thedifficultyisunderstanding(30)electromagneticfieldsmightaffectanaircraft'scomputers.Expertsknowthattheportabledevicesgiveoffradiation,each(31)(affect)thosewavelengthswhichaircraftsuseforcommunication.But,becausetheyhavenotbeenabletoreproducetheseeffectsinalaborato
6、ry,theyhavenowayofknowingwhethertheinterferencemightbedangerousornot.・Thefactthataircraftmaybeintroublebecauseoftheinterferenceraisestherisk(32)somepeoplemayuseradiosystemsinordertodamagenavigation(导撕i)equipment.Aswonying,though,isthepassengerwhocantheartheinstructionsto
7、turnoffhisradiobecausethemusic'stooloud.(B)It'sofficial,nomatterwhereyoulive:heathfuleatingis33thebestwaystoprotectyouragingbrain.Conversely,adietthatskimpsonfruit,vegetables,wholegrains,nutsandfishandincludeslotsoffriedfoods,redmeatandalcoholishighlylikelytopavearoadtoc
8、ognitiveruin.Onaverage,16.8%ofthemenandwomenfollowedwerefound34(lose)somecognitivehorsepowerinthestudy
