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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.UniversityofMisso
2、uri(MU)researchersaredevelopinganuclearenergysourcethatissmaller,lighterandmoreefficient.“Toprovideenoughpower,weneedcertainmethodswithhighenergydensity(密度)”，saidJaeKwon,assistantprofessorofelectricalandcomputerengineeringatMU.“Theradioisotope(放射性同位素)batterycanpr
3、ovidepowerdensitythatismuchhigherthanchemicalbatteries.”Kwonandhisresearchteamhavebeenworkingonbuildingasmallnuclearbattery,presentlythesizeandthicknessofapenny,intendedtopowervariousmicro/nanoelectromechanrealsystems(M/NEMS).Althoughnuclearbatteriescancauseconce
4、rns,Kwonsaidtheyaresafe.“Peopleheartheword‘nuclear’andthinkofsomethingverydangerous,”hesaid,“However,nuclearpowersourceshavealreadybeensafelypoweringavarietyofdevices,suchaspace-makers,spacesatellitesandunderwatersystems.”Hisnewideaisnotonlyinthebattery’ssize,but
5、alsoinitssemiconductor(半导体).Kwon’sbatteryusesaliquidsemiconductorratherthanasolidsemiconductor.“Thekeypartofusingaradioactivebatteryisthatwhenyouharvesttheenergy,partoftheradiationenergycandamagethelatticestructure(晶体结构)ofthesolidsemiconductor,”Kwonsaid,“Byusinga
6、liquidsemiconductor,webelievewecanminimizethatproblem.”TogetherwithJ.DavidRobertson,chemistryprofessorandassociatedirectoroftheMUResearchReactor,Kwonisworkingtobuildandtestthebattery.Inthefuture,theyhopetoincreasethebattery’spower,shrinkitssizeandtrywithvariousot
7、hermaterials.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.Heisworkingonanuclearenergysource.26爱心用心专心D.Hemadeabre
8、akthroughincomputerengineering.72.JaeKwongaveexamplesinParagraph4_________.A.toshowchemicalbatteriesarewidelyapplied.B.tointroducenuclearbatteriescanbesafelyus
