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词数:333 话题:VR(虚拟现实) 文体:议论文
You‘llprobablynevergotoMarsorsingonthestagewithTheRollingStones.Butifvirtualreality(VR)everlivesuptoitspromise,youmightbeabletodoallthesethings—andmanymore—withoutevenleavingyourhome.Unlikerealreality,virtualrealitymeanssimulating(模仿)bitsofourworld.Apartfromgamesandentertainment,it‘slongbeenusedfortrainingairlinepilotsandsurgeonsandforhelpingscientiststofigureoutcomplexproblemssuchasthestructureofproteinmolecules(分子).Thenhowdoesitwork?
Closeyoureyesandthinkofvirtualrealityandyouprobablypicturesomethinglikethis:amanwearingawrap-aroundheadsetanddatagloveswiredintoapowerfulworkstationorsupercomputer.WhatdistinguishesVRfromanordinarycomputerexperienceisthenatureoftheinputandoutput.Whereanordinarycomputerusesthingslikeakeyboard,mouse,orspeechrecognitionforinput,VRusessensorsthatdetecthowyourbodyismoving.AndwhereaPCdisplaysoutputonascreen,VRusestwoscreens(oneforeacheye),surround-soundspeakers,andmaybesomeformsoftouchandbodyfeedbackaswell.
VRhasbeenroutinelyusedbyscientists,doctors,dentists,engineers,architects,archaeologists,andthemilitaryforaboutthelast30years.Difficultanddangerousjobsarehardtotrainfor.Howcanyousafelypractisetakingatriptospace,makingaparachutejump,orcarryingoutbrainsurgery?Allthesethingsareobviouscandidatesforvirtualrealityapplications.
Likeanytechnology,virtualrealityhasbothgoodandbadpoints.Criticsalwaysraisetheriskthatpeoplemaybeaddictedtoalternativerealitiestothepointofignoringtheirreal-worldlives—butthatcriticismhasbeenleveledateverythingfromradioandTVtocomputergamesandtheInternet.Likemanytechnologies,VRtakeslittleornothingawayfromtherealworld:youdon‘thavetouseitifyoudon‘twantto.
1.Whatequipmentdoweprobablyneedforvirtualreality?
A.Akeyboard,aheadsetandasupercomputer.
B.Aheadset,dataglovesandaspeechrecognition.
C.Aheadset,dataglovesandasupercomputer.
D.Akeyboard,amouseandaspeechrecognition.
2.WhatisParagraph3mainlyabout?
A.Theprinciplesofvirtualreality.
B.Theapplicationsofvirtualreality.
C.Thehistoryofvirtualreality.
D.Theinfluencesofvirtualreality.
3.Accordingtothepassage,whatdoesvirtualrealitymean?
A.Imaginingbeautifulthingsinourmind.
B.Creatingsomethingthatdoesn‘texist.
C.Experiencingthingsthatdon‘treallyexist.
D.Cloningsomethingthathasdiedout.
4.Whatisthewriter‘sattitudetowardsVR?
A.Appreciative. B.Cautious.
C.Sceptical. D.Indifferent.
