剑桥8真题阅读解析

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1、剑桥雅思8-第三套试题-阅读部分-PASSAGE1-阅读真题原文部分:　　READINGPASSAGE1　　Youshouldspendabout20minutesonQuestions1-13whicharebasedonReadingPassage1below. StrikingBackatLightningWithLasers   　　Seldomistheweathermoredramaticthanwhenthunderstormsstrike.Theirelectricalfuryinflictsdeathorseriousinjuryonaround500pe

2、opleeachyearintheUnitedStatesalone.Asthecloudsrollin,aleisurelyroundofgolfcanbecomeaterrifyingdicewithdeath-outintheopen,alonegolfermaybealightningbolt'smostinvitingtarget.Andthereisdamagetopropertytoo.LightningdamagecostsAmericanpowercompaniesmorethan$100millionayear.　　Butresearchersinthe

3、UnitedStatesandJapanareplanningtohitback.Alreadyinlaboratorytrialstheyhavetestedstrategiesforneutralisingthepowerofthunderstorms,andthiswintertheywillbraverealstorms,equippedwithanarmouryoflasersthattheywillbepointingtowardstheheavenstodischargethundercloudsbeforelightningcanstrike.　　Theid

4、eaofforcingstormcloudstodischargetheirlightningoncommandisnotnew.Intheearly1960s,researcherstriedfiringrocketstrailingwiresintothundercloudstosetupaneasydischargepathforthehugeelectricchargesthatthesecloudsgenerate.ThetechniquesurvivestothisdayatatestsiteinFloridarunbytheUniversityofFlorid

5、a,withsupportfromtheElectricalPowerResearchInstitute(EPRI),basedinCalifornia.EPRI,whichisfundedbypowercompanies,islookingatwaystoprotecttheUnitedStates'powergridfromlightningstrikes.'Wecancausethelightningtostrikewherewewantittousingrockets,'saysRalphBernstein,manageroflightningprojectsatE

6、PRI.Therocketsiteisprovidingprecisemeasurementsoflightningvoltagesandallowingengineerstocheckhowelectricalequipmentbearsup.　　Badbehaviour　　Butwhilerocketsarefineforresearch,theycannotprovidetheprotectionfromlightningstrikesthateveryoneislookingfor.Therocketscostaround$1,200each,canonlybefi

7、redatalimitedfrequencyandtheirfailurerateisabout40percent.Andevenwhentheydotriggerlightning,thingsstilldonotalwaysgoaccordingtoplan.'Lightningisnotperfectlywellbehaved,'saysBernstein.'Occasionally,itwilltakeabranchandgosomeplaceitwasn'tsupposedtogo.'　　Andanywa