科普知识类专题八│科普知识类专题导读专题八│专题导读科普类文章是高考阅读理解中的难点题材，其取材密切联系当前经济和科技等方面的变化，以介绍某一科学现象居多。科普类文章具有结构严谨，逻辑性强等特点。其主要命题形式有事实细节题、词义猜测题、推理判断题以及主旨概括题等，其中推理判断题居多。这类文章的总体特点是：科技词汇多，句子结构复杂，理论性强，逻辑严谨。具体说来它有以下几个特点：专题八│专题导读1．文章中词汇的意义比较单一、稳定、简明，不带感情色彩，具有单一性和准确性的特点。这类文章通常不会出现文学英语中采用的排比、比喻、夸张等修辞手法，一词多义的现象也不多见。2．句子结构较复杂，语法分析较困难。为了描述一个客观事物，严密地表达自己的思想，作者经常会使用集多种语法现象于一体的长句。3．常使用被动语态，尤其是一些惯用被动句式。专题八│专题导读1．文章中词汇的意义比较单一、稳定、简明，不带感情色彩，具有单一性和准确性的特点。这类文章通常不会出现文学英语中采用的排比、比喻、夸张等修辞手法，一词多义的现象也不多见。2．句子结构较复杂，语法分析较困难。为了描述一个客观事物，严密地表达自己的思想，作者经常会使用集多种语法现象于一体的长句。3．常使用被动语态，尤其是一些惯用被动句式。真题再现专题八│真题再现[2010·山东]Batteriescanpoweranythingfromsmallsensorstolargesystems.Whilescientistsarefindingwaystomakethemsmallerbutevenmorepowerful，problemscanarisewhenthesebatteriesaremuchlargerandheavierthanthedevicesthemselves.UniversityofMissouri(MU)researchersaredevelopinganuclearenergysourcethatissmaller，lighterandmoreefficient.专题八│真题再现“Toprovideenoughpower，weneedcertainmethodswithhighenergydensity(密度)，”saidJaeKwon，assistantprofessorofelectricalandcomputerengineeringatMU.“Theradioisotope(放射性同位素)batterycanprovidepowerdensitythatismuchhigherthanchemicalbatteries.”Kwonandhisresearchteamhavebeenworkingonbuildingasmallnuclearbattery，presentlythesizeandthicknessofapenny，intendedtopowervariousmicro/nanoelectromechanicalsystems(M/NEMS)．Althoughnuclearbatteriescancauseconcerns，Kwonsaidtheyaresafe.专题八│真题再现“Peopleheartheword‘nuclear’andthinkofsomethingverydangerous，”hesaid.“However，nuclearpowersourceshavealreadybeensafelypoweringavarietyofdevices，suchaspacemakers，spacesatellitesandunderwatersystems.”Hisnewideaisnotonlyinthebattery’ssize，butalsoinitssemiconductor(半导体)．Kwon’sbatteryusesaliquidsemiconductorratherthanasolidsemiconductor.专题八│真题再现“Thekeypartofusingaradioactivebatteryisthatwhenyouharvesttheenergy，partoftheradiationenergycandamagethelatticestructure(晶格结构)ofthesolidsemiconductor，”Kwonsaid.“Byusingaliquidsemiconductor，webelievewecanminimizethatproblem.”专题八│真题再现TogetherwithJ.DavidRobertson，chemistryprofessorandassociatedirectoroftheMUResearchReactor，Kwonisworkingtobuildandtestthebattery.Inthefuture，theyhopetoincreasethebattery’spower，shrinkitssizeandtrywithvariousothermaterials.Kwonsaidthatthebatterycouldbethinnerthanthethicknessofhumanhair.专题八│真题再现()1.WhichofthefollowingistrueofJaeKwon?A.HeteacheschemistryatMU.B.Hedevelopedachemicalbattery.C.Heisworkingonanuclearenergysource.D.Hemadeabreakthroughincomputerengineering.专题八│真题再现()2.JaeKwongaveexamplesinParagraph4________.A.toshowchemicalbatteriesarewidelyappliedB.toindicatenuclearbatteriescanbesafelyusedC.todescribeanuclearpoweredsystemD.tointroducevariousenergysources专题八│真题再现()3.Liquidsemiconductorisusedto________.A.getridoftheradioactivewasteB.te...
