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1、专题三阅读理解之科技类（3）（新课标）三、科技类【典例探究】（2010·山东卷·D）Batteriescanpoweranythingfromsmallsensorstolargesystems.Whilescientistsarefindingwaystomakethemsmallerbutevenmorepowerful,problemscanarisewhenthesebatteriesaremuchlargerandheavierthanthedevicesthemselves.UniversityofM
2、issouri(MU)researchersaredevelopinganuclearenergysourcethatissmaller,lighterandmoreefficient.“Toprovideenoughpower,weneedcertainmethodswithhighenergydensity(密度)”，saidJaeKwon,assistantprofessorofelectricalandcomputerengineeringatMU.“Theradioisotope(放射性同位素)batt
3、erycanprovidepowerdensitythatismuchhigherthanchemicalbatteries.”Kwonandhisresearchteamhavebeenworkingonbuildingasmallnuclearbattery,presentlythesizeandthicknessofapenny,intendedtopowervariousmicro/nanoelectromechanrealsystems(M/NEMS).Althoughnuclearbatteriesc
4、ancauseconcerns,Kwonsaidtheyaresafe.“Peopleheartheword‘nuclear’andthinkofsomethingverydangerous,”hesaid,“However,nuclearpowersourceshavealreadybeensafelypoweringavarietyofdevices,suchaspace-makers,spacesatellitesandunderwatersystems.”Hisnewideaisnotonlyintheb
5、attery’ssize,butalsoinitssemiconductor(半导体).Kwon’sbatteryusesaliquidsemiconductorratherthanasolidsemiconductor.“Thekeypartofusingaradioactivebatteryisthatwhenyouharvesttheenergy,partoftheradiationenergycandamagethelatticestructure(晶体结构)ofthesolidsemiconductor
6、,”Kwonsaid,“Byusingaliquidsemiconductor,webelievewecanminimizethatproblem.”TogetherwithJ.DavidRobertson,chemistryprofessorandassociatedirectoroftheMUResearchReactor,Kwonisworkingtobuildandtestthebattery.Inthefuture,theyhopetoincreasethebattery’spower,shrinkit
7、ssizeandtrywithvariousothermaterials.Kwonsaidthatbatterycouldbethinnerthanthethicknessofhumanhair.【文章大意】本篇为科普短文，介绍由美国密苏里大学研究者所开发的核能电池的情况。71.WhichofthefollowingistrueofJaeKwon?A.HeteacheschemistryatMU. B.Hedevelopedachemicalbattery.C.Heisworkingonanuclearenerg
8、ysource.D.Hemadeabreakthroughincomputerengineering.72.JaeKwongaveexamplesinParagraph4_________.A.toshowchemicalbatteriesarewidelyapplied.B.tointroducenuclearbatteriescanbesafelyused.C.tod
