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1、正保远程教育（美国纽交所上市公司 代码：DL）BatteriesBuiltbyVirusesWhatdochickenpox,thecommoncold,theflu,andAIDShaveincommon?They'realldiseasecausedbyviruses,tinymicroorganismsthatcanpassfrompersontoperson.It'snowonder1thatwhenmostpeoplethinkaboutviruses,findingwaystosteerclearof2virusesiswhat'sonpeople'sminds.
2、Noteveryonerunsfromthetinydiseasecarriers,though3.InCambridge,Massachusetts4,scientistshavediscoveredthatsomevirusescanbehelpfulinanunusualway.Theyareputtingvirusestowork,teachingthemtobuildsomeoftheworld'ssmallestrechargeablebatteries.Virusesandbatteriesmayseemlikeanunusualpair,butthey'ren
3、otsostrangeforengineerAngelaBelcher,whofirstcameupwith5theidea.AttheMassachusettsInstituteofTechnology（MIT）inCambridge,sheandhercollaboratorsbringtogetherdifferentareasofscienceinnewways.Inthecaseofthevirus-builtbatteries,thescientistscombinewhattheyknowaboutbiology,technologyandproductiont
4、echniques.Belcher'steamincludesPaulaHammond,whohelpsputtogetherthetinybatteries,andYet-MingChiang,anexpertonhowtostoreenergyintheformofabattery."We'reworkingonthingswetraditionallydon'tassociatewithnature,"saysHammond.Manybatteriesarealreadyprettysmall.YoucanholdA,CandDbatteries6inyourhand.
5、Thecoin-likebatteriesthatpowerwatchesareoftensmallerthanapenny.However,everyyear,newelectronicdeviceslikepersonalmusicplayersorcellphonesgetsmallerthantheyearbefore.Asthesedevicesshrink,ordinarybakerieswon'tbesmallenoughtofitinside.Theidealbatterywillstorealotofenergyinasmallpackage.Rightno
6、w,Belcher'smodelbattery,ametallicdiskcompletelybuiltbyviruses,lookslikearegularwatchbattery.Butinside,itscomponentsareverysmall-sotinyyoucanonlyseethemwithapowerfulmicroscope.Howsmallarethesebatteryparts?Togetsomeideaofthesize,pluckonehairfromyourhead.Placeyourhaironapieceofwhitepaperandtry
7、toseehowwideyourhairis-prettythin,right?Althoughthewidthofeachperson'shairisabitdifferent,youcouldprobablyfitabout10ofthesevirus-builtbatteryparts,sidetoside,acrossonehair.Thesemicrobatteriesmaychangethewaywelookatviruses7.词汇：chickenpox水痘collaboratorn.合作
