全国公共英语一级考试阅读试题及解析全国公共英语一级考试阅读精选试题及解析Beingsingleisbetterthanbeinginanunfaithfulrelationship.以下是店铺为大家搜索整理的全国公共英语一级考试阅读精选试题及解析，希望能给大家带来帮助!SuperconductingMaterialsThestoneage，TheIronAge.Entireepochshavebeennamedformaterials.Sowhattocallthedecadesahead?Thechoicewillbetough.Welcometotheageofsuperstuff.Materialscience——oncetheleastsexytechnology-isburstingwithnew，practicaldiscoveriesledbysuperconductingceramicsthatmayrevolutionizeelectronics.Butsuperconductorsarejustpartofthepicture：fromhouseandcarstocookpotsandartificialteeth，theworldwillsomedaybemadeofdifferentstuff.Exoticplastics，glassandceramicswillshapethefuturejustassurelyashavegeneticengineeringandcomputerscience.Thekeytothenewmaterialsisresearchers‘increasingabilitytomanipulatesubstancesatthemolecularlevel.Ceramics，forexample，havelongbeenlimitedbytheirbrittleness.Butbyminimizingthemicroscopicimperfectionsthatcauseit，scientistsaremakingfarstrongerceramicsthatstillretainsuchqualitiesashardnessandheatresistance.FordMotorCo.nowusesceramictoolstocutsteel.AfirmcalledKyocerahascreatedalineofceramicscissorsandknivesthatstaysharpforyearsandneverrustorcorrode.Asimilartransformationhasovertakenplastics.High-strengthpolymersnowformbridges，ice-skatingrinksandhelicopterrotors.Andonenewplasticthatgenerateselectricitywhenvibratedorpushedisusedinelectricguitars，touchsensorsforrobothandsandkaratejacketsthatautomaticallyrecordeachpunchandchop.Evenplasticlitter，whichoncethreatenedtopermanentlyblotthelandscape，hasprovedamenabletomoleculartinkering.Severalmanufacturersnowmakebiodegradableforms;someplasticsix-packringsforexample，graduallydecomposewhenexposedtosunlight.Researchersaredevelopingwaystomakeplasticsasrecyclableasmetalorglass.Besides，composites-plasticreinforcedwithfibersofgraphiteorothercompounds-madetheround-the-worldflightofthevoyagerpossibleandhaveevenbeenprovedincombat：ahelmetsavedaninfantryman‘slifebydeflectingtwobulletsintheGrenadainvasion.Someadvancedmaterialsareoldstandardwith