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时间:2018-04-28
《2012年职称英语理工类官方教材新增内容—阅读理解》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、2012年职称英语理工类官方教材新增内容阅读理解考试重点第六篇MakingLightofSleep暂无 第十九篇Graphene’sSuperstrength Bigtechnologycomesintinypackages.Newcellphonesandpersonalcomputersgetsmallereveryyear,whichmeanstheseelectronicsrequireevensmallercomponentsontheinside. Engineersarelookingforcreativewaystobuildthes
2、ecomponents,andthey’veturnedtheireyestographeme,asuperthinmaterial,madeofcarbon,thatcouldchangethefutureofelectronics. Thisyear’sNobelPrizeforPhysicshasbeenawardedtoAndreGeimandKostyaNovoselovfromtheUniversityofManchester,UK.forthediscoveryofgraphene.Grapheneisn’tjustsmall,it’s“
3、thethinnestpossiblematerialinthisworld,”saysNovoselov.Hecallsita“wondermaterial.”It’ssothinthatyouwouldneedtostackabout25,000sheetsjusttomakeapileasthickasapieceofordinarywhitePaper.Ifyouweretoholdasheetofgrapheneinyourfingers,you’dhavenoideabecauseyouwouldn’tbeabletoseeit. Carb
4、onisoneofthemostabundantelementsintheuniverse.Everyknownkindoflifecontainscarbon.Grapheneisasheetofcarbon,butonlyoneatomthick.Youdon’thavetolookfartofindgraphene—it’Sallaroundyou.Ifyouwantthishigh—techwonderstuff.allyouneedisapencil,paperandalittleadhesivetape.Usethepenciltoshade
5、asmallareaonthepaper,andthenapplyasmallpieceotadhesivetapeoverthearea.Whenyoupullupthetape,you’llseethatitpullsupathinlayerofsomeoftheshadingfromyourpencil.Thatlayeriscalledgraphite,oneofthesoftestmineralsintheworld. Nowstickthesamepieceoftapeonanothersheetofpaperandpullthetapeu
6、p——thereshouldbeaneventhinnerlayer.thistimeleftonthepaper.Nowimaginethatyoudothisoverandover,untilyougetthethinnestpossiblelayerofmaterialonthepaper.Thislayerwouldbeonlyoneatomthick,andyouwouldn’tbeabletoseeit.Graphiteismadeoflayersofgraphene,sowhenyougettothethinnestpossiblelaye
7、r,you’vefoundgraphene.第三十八篇 “LifeFormFound”onSaturn'sTitan ScientistssaytheyhavediscoveredhintsofalienlifeontheSaturn’smoon.ThediscoveryofasortoflifewasannouncedafterresearchersattheUSspaceagency,NASA,analyzeddatafromspacecraftCassini,whichpointedtotheexistenceofmethane-basedfor
8、moflifeonSaturn’sbiggestmoon. Scientist
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