阅读理解

Inmosttownstodayyoucanseeteenagersstandingbeforeelectronicmachineswithflashinglightsshootingatspaceshipsfromotherplanetsanddroppingbombsonstrangemonsters(恶魔).ThemachineshavenameslikeSpaceWarriorDarkInvaderandsoon.Itusedtobebelievedthatdamagewasdoneonlytothesestrangevisitorsfromouterspacebutnowitseemsthattheyarestrikingback.

Manyteenagerslikeelectronicgamessomuchthattheycan'tstopplaying.Theyspendhourstightlyholdingthejoy-stickcontrolsandconstantlypressingbuttonsmarkedwith“fire.”Theydeveloppairsontheirfingersbecauseoftheconstantpressure.Theyplayandplaysothatthepainshavenochancetohealproperly.Therapidwristmovementrequiredtoguidethespaceshipacrossthescreencausesanotherproblemthemusclesofthewristandarmbecomesoinflamedandswollen(充血红肿)thattheypressagainstthebones.Thisconditioniswhatdoctorsnowcall“SpaceWorrior'sWrist”.Otherstrangeachesandpainsalsotendtoaffecttheelbowsandshoulders.

Anotherevenmorealarmingproblemisshownbythecaseofa17-year-oldgirlwhichwasrecentlyreportedintheBritishMedicalJournal.Shehadbeenplayingvariouskindsofelectronicgamesformorethantwohoursaday.Herfatherrepairedgamesandmachinesandshecouldusethecassettesandsystemsinhisworkshopasoftenassheliked.OnedayafterplayingagamecalledDarkInvadorshelostconsciousness(晕倒)andfelltothefloor.

Doctorswhoexaminedherfoundshewassufferingfromanunusualillnesscausedbylightsflashingataparticularfrequency.

1．Electronicgamesarefoundverypopularwith________.

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A．peoplelivingintowns

B．studentsstudyinginhighschools

C．girlsworkingintheirfather'sworkshops

D．youngpeopleagedabout15～20

2．“SpaceWarrior'sWrist”iscausedby________.

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A．constantlypressingthebuttons

B．rapidlymovingacrossthescreen

C．tightlyholdingthejoy-stickcontrols

D．inflamedandswollenmusclesofthewrist

3．Thecaseofa17-year-oldgirlgivenbythewritershowsthatthewriter________.

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A．supportsplayingelectronic