高考英语二轮复习专题训练：阅读理解(68).doc

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1、山西省2012高考英语二轮复习专题训练：阅读理解（68）阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。ACleanyourears,becauseairportsecuritymightsoonbescanningthem.Accordingtoarecentdiscovery,theshapeofearscouldprovideareliablenewwayofidentifyingpeopleatairports.Researchersdiscoveredthatears

2、ofeachpersonhaveauniqueshapeandtheyhavecreatedasystemthatcanscanthem.Theearscanningtechniqueusesatechnologycalledimageraytransformthathighlightsallthetubularstructures(结构)oftheearandmeasuresthem.ProfessorMarkNixon,acomputerscientistwholedtheteamfromtheUniversityo

3、fSouthampton,believesearscanningcouldtakeplaceaspassengerswalkthroughsecuritygates,forexample,byplacingcamerasoneithersidetorecordanimageoftheirears.Comparingtheresultsagainstadatabaseofearshapes,thenewsystemcouldhelpairportsecurityworkersinstantlyidentifypasseng

4、ers.Nixonandhisteamtested252imagesofdifferentearsandfoundthesystemwasabletomatcheacheartoaseparateimageheldinitsdatabasewith99percentaccuracy.Besidesearscanning,therehavebeenothersystemsdevelopedforidentityrecognition.“Withfacialrecognition,thesystemsareoftenconf

5、usedbycrowsfeet(鱼尾纹)andothersignsofageing,”Nixonsaid.“Yourears,however,ageverygracefully.Theygrowproportionally(按比例)andyourlobe(耳垂)getsabitlarger,butotherwiseyourearsarefullyformedfrombirth.”What’smore,facialrecognitionsoftwareisoftenconfusedbychangesinexpression

6、sopeopleneedtocontroltheirfacesandinsomecasesevenavoidwearingmake-up.Anearscansystemwouldalsoofferalessinvasivealternativetoretina(视网膜)scanning,whichrequirespassengerstostareatscannersfromacloserange.Fingertipdetectionhaslongbeenthemosteffectivewayofidentifyingso

7、meone.Nixonexpectstheretobeacombinationofdifferenttechniquesthatcanbeusedatthesametimetoidentifyaperson.”1.Theearscanningsystemwouldhelptofindout_____.A.whereyoucomefromB.whetheryouarehealthyC.whoyouareD.whosharesyourearshape2.Thearticledoesnotsay______.A.whodeve

8、lopedthesystemB.howthesystemworksC.wherethesystemcanbeappliedD.howlongthesystemtooktodevelop3.Earscanningwouldworkbetterthanfacialrecognitionmainlybecause_____