高中英语阅读理解精读荟萃(基础篇)3.doc

高中英语阅读理解精读荟萃(基础篇)3.doc

ID:51420142

大小:117.50 KB

页数:18页

时间:2020-03-24

高中英语阅读理解精读荟萃(基础篇)3.doc_第1页
高中英语阅读理解精读荟萃(基础篇)3.doc_第2页
高中英语阅读理解精读荟萃(基础篇)3.doc_第3页
高中英语阅读理解精读荟萃(基础篇)3.doc_第4页
高中英语阅读理解精读荟萃(基础篇)3.doc_第5页
资源描述:

《高中英语阅读理解精读荟萃(基础篇)3.doc》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库

1、PassageOneSuperconductingMaterialsThestoneage,TheIronAge.Entireepochshavebeennamedformaterials.Sowhattocallthedecadesahead?Thechoicewillbetough・Welcometotheageofsuperstuff.Materialscience一oncetheleastsexytechnology一isburstingwithnew,practicaldiscoveriesledbysuperconductin

2、gceramicsthatmayrevolutionizeelectronics・Butsuperconductorsarejustpartofthepicture:fromhouseandcarstocookpotsandartificialteeth,theworldwillsomedaybemadeofdifferentstuff.Exoticplastics,glassandceramicswillshapethefuturejustassurelyashavegeneticengineeringandcomputerscienc

3、e・Thekeytothenewmaterialsisresearchers^increasingabilitytomanipulatesubstancesatthemolecularlevel.Ceramics,forexample,havelongbeenlimitedbytheirbrit什eness・Butbyminimizingthemicroscopicimperfectionsthatcauseit,scientistsaremakingfarstrongerceramicsthatstillretainsuchqualit

4、iesashardnessandheatresistanee.FordMotorCo.nowusesceramictoolstocutsteel.AfirmcalledKyocerahascreatedalineofceramicscissorsandknivesthatstaysharpforyearsandneverrustorcorrode・Asimilartransformationhasovertakenplastics.High-strengthpolymersnowformbridges,ice-skatingrinksan

5、dhelicopterrotors・Andonenewplasticthatgenerateselectricitywhenvibratedorpushedisusedinelectricguitars,touchsensorsforrobothandsandkaratejacketsthatautomaticallyrecordeachpunchandchop・Evenplasticlitter,whichoncethreatenedtopermanentlyblotthelandscape,hasprovedamenabletomol

6、eculartinkering.Severalmanufacturersnowmakebiodegradableforms;someplasticsix-packringsforexample,graduallydecomposewhenexposedtosunlight.Researchersaredevelopingwaystomakeplasticsasrecyclableasmetalorglass.Besides,composites一plasticreinforcedwithfibersofgraphiteorothercom

7、pounds一madetheround-the-worldflightofthevoyagerpossibleandhaveevenbeenprovedincombat:ahelmetsavedaninfantryman^lifebydeflectingtwobulletsintheGrenadainvasion.Someadvancedmaterialsareoldstandardwithanewtwist.Thenewestfiberopticcablethatcarrytelephonecallscross-countryarema

8、deofglasssotransparentthatapieceof100milesthickisclearerthanastandardwindowpane.Butnewmaterialsh

当前文档最多预览五页,下载文档查看全文

此文档下载收益归作者所有

当前文档最多预览五页,下载文档查看全文
温馨提示:
1. 部分包含数学公式或PPT动画的文件,查看预览时可能会显示错乱或异常,文件下载后无此问题,请放心下载。
2. 本文档由用户上传,版权归属用户,天天文库负责整理代发布。如果您对本文档版权有争议请及时联系客服。
3. 下载前请仔细阅读文档内容,确认文档内容符合您的需求后进行下载,若出现内容与标题不符可向本站投诉处理。
4. 下载文档时可能由于网络波动等原因无法下载或下载错误,付费完成后未能成功下载的用户请联系客服处理。