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1、Unit3LifeinthefutureⅠ.阅读理解You?llprobablynevergotoMarsorsingonthestagewiththeRollingStones.Butifvirtualreality(VR)everlivesuptoitspromise,youmightbeabletodoallthesethings—andmanymore—withoutevenleavingyourhome.Unlikerealreality,virtualrealitymeanssimulating(模
2、仿)bitsofourworld.Apartfromgamesandentertainment,it?slongbeenusedfortrainingairlinepilotsandsurgeonsandforhelpingscientiststofigureoutcomplexproblemssuchasthestructureofproteinmolecules(分子).Thenhowdoesitwork?Closeyoureyesandthinkofvirtualrealityandyouprobably
3、picturesomethinglikethis:amanwearingawrap-aroundheadsetanddatagloveswiredintoapowerfulworkstationorsupercomputer.WhatdistinguishesVRfromanordinarycomputerexperienceisthenatureoftheinputandoutput.Whereanordinarycomputerusesthingslikeakeyboard,mouse,orspeechre
4、cognitionforinput,VRusessensorsthatdetecthowyourbodyismoving.AndwhereaPCdisplaysoutputonascreen,VRusestwoscreens(oneforeacheye),surround-soundspeakers,andmaybesomeformsoftouchandbodyfeedbackaswell.VRhasbeenroutinelyusedbyscientists,doctors,dentists,engineers
5、,architects,archaeologists,andthemilitaryforaboutthelast30years.Difficultanddangerousjobsarehardtotrainfor.Howcanyousafelypractisetakingatriptospace,makingaparachutejump,orcarryingoutbrainsurgery?Allthesethingsareobviouscandidatesforvirtualrealityapplication
6、s.Likeanytechnology,virtualrealityhasbothgoodandbadpoints.Criticsalwaysraisetheriskthatpeoplemaybeaddictedtoalternativerealitiestothepointofignoringtheirreal-worldlives—butthatcriticismhasbeenleveledateverythingfromradioandTVtocomputergamesandtheInternet.Lik
7、emanytechnologies,VRtakeslittleornothingawayfromtherealworld:youdon?thavetouseitifyoudon?twantto.1.Whatequipmentdoweprobablyneedforvirtualreality?A.Akeyboard,aheadsetandasupercomputer.B.Aheadset,dataglovesandspeechrecognition.C.Aheadset,dataglovesandasuperco
8、mputer.D.Akeyboard,amouseandspeechrecognition.2.WhatisParagraph3mainlyabout?A.Theprinciplesofvirtualreality.B.Theapplicationsofvirtualreality.C.Thehistoryofvirtualreality.D.Theinfluencesofvirtua
