2016职称英语 理工a概括大意与完成句子 字典版

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1、32FJgong-a第十一篇TheTiniestElectricMotorintheWorld1Scientistsrecentlymadepublicthetiniestelectricmotoreverbuilt.Youcouldstuffhundredsofthemintotheperiodattheendofthissentence.Onedayasimilarenginemightpoweratinymechanicaldoctorthatwouldtravelthroughyourbodytoremoveyour

2、disease.2Themotorworksbyshufflingatomsbetweentwomoltenmetaldropletsinacarbonnanotube.Onedropletisevensmallerthantheother.Whenasmallelectriccurrentisappliedtothedroplets,atomsslowlygetoutofthelargerdropletandjointhesmallerone.Thesmalldropletgrows—butnevergetsasbigas

3、theotherdropletandeventuallybumpsintothelargedroplet.Astheytouch,thelargedropletrapidlysopsuptheatomsithadpreviouslylost.Thisquickshiftinenergyproducesapowerstroke3Thetechniqueexploitsthefactthatsurfacetension—thetendencyofatomsormoleculestoresistseparating—becomes

4、moreimportantatsmallscales.Surfacetensionisthesamethingthatallowssomeinsectstowalkonwater.4Althoughtheamountofenergyproducedissmall—20microwatts—itisquiteimpressiveinrelationtothetinyscaleofthemotor.Thewholesetupislessthan200nanometersonaside,orhundredsoftimessmall

5、erthanthewidthofahumanhair.Ifitcouldbescaleduptothesizeofanautomobileengine,itwouldbe100milliontimesmorepowerfulthanaToyotaCamry's225horsepowerV6engine.5In1988,ProfessorRichardMullerandcolleaguesmadethefirstoperatingmicromotor,whichwas100micronsacross,oraboutthethi

6、cknessofahumanhair.In2003,Zettl'sgroupcreatedthefirstnanoscalemotor.In2006,theybuiltananoconveyor,whichmovestinyparticlesalonglikecarsinafactory.6Nanotechnologyengineerstrytomimicnature,buildingthingsatom-by-atom.Amongotherthings,nanomotorscouldbeusedinopticalcircu

7、itstoredirectlight,aprocesscalledopticalswitching.Futuristsenvisionadaywhennanomachines,poweredbynanomotors,travelinsideyourbodytofinddiseaseandrepairdamagedcells.练习：1．Paragraph2ETheWorkingPrincipleoftheNanomotor2．Paragraph4BADescriptionoftheNanomotorinTermsofPower

8、andSize3．Paragraph5DPreviousInventionsofNanoscaleProducts4．Paragraph6FPossibleFieldsofApplicationintheFuture5．Doctorsenvisionthatthenanomotorwoul