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第PAGE\*MERGEFORMAT15页共NUMPAGES\*MERGEFORMAT15页 2021年6月大学英语六级仔细阅读练习题附答案及解析(1) SectionCDirections:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.Foreachofthemthereare.fourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.PassageOneQuestions56to60arebasedonthefollowingpassage.3Dglasseshelpdoctorsperforminvasivesurgerywhentheirhandsareobscuredfromview.Moviegoersaren'ttheonlyoneswearing3Dglassesnowadays—doctorscouldbenefitfromthem,too,anewstudysuggests.Inthepast,doctorshavebeenskepticalofusing3Dtechnologyintheirwork,preferringtorelyontheirownexperience.Butthatmaychange,thankstoimproved3Dglassesandevenglasses-freesystems.Fundedbyindustrysponsors,thestudyof50surgeonsusingthenewtechnologyshowedimprovementsinsurgicalprecisionandspeed."Whilethetechnologystillrequiressomefree-tuning,technologywithouttheneedtowearspecialglasseswillincreasethepopularityof3Dsystemsinoperatingrooms,"studyleaderUlrichLeineroftheFratmhoferHeinrichHertzInstitute(HHI)inBerlinsaidinastatement.Improvementstoscreensaredrivingdevelopmentsin3Dtechnology.High-definitionscreensarealreadyavailable.Thenextstepisultra-highdefinition,withasixteenfoldimprovementinresolution,accordingtostudyco-authorMichaelWitteofHHI.Toevaluatewhethernew3Dtechnologywasreadyforhospitalapplications,researchersinvitedsurgeonsfromtheKlinikumrechtsderIsar'ssurgicalhospitaltotestitout.Aleadingendoscopemanufacturerandaninternationaldisplaycompanyfundedthestudy.Thesurgeonstestedfourdifferentsystems:2D,3Dwithglasses,3Dwithoutglassesandamirror-based3Dsystem.Theglasses-freemodelreliedonaneye-trackingcamerasystemthatdeliveredseparateimagestoeacheye,creatinga3Deffectinthebrain.Theimagescamefromendoscopiccamerasusedinsurgery.Thedoctorspracticedasimulated,routinesurgicalprocedureinwhichtheysewedupawoundinamodelpatient'sstomachusinganeedleandthread.Justasinaminimallyinvasivesurgery,theirhandswereobscuredfromviewan
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