职称英语考试补全对话.docx

职称英语考试补全对话.docx

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职称英语考试补全对话

第一篇MobilePhones

　　Mobilephonesshouldcarryalabeliftheyproved1tobeadangeroussourceofradiation,accordingtoRobertBell,ascientist.Andnomoremobilephonetransmittertowersshouldbebuiltuntilthelong-termhealtheffectsoftheelectromagneticradiationtheyemitarescientificallyevaluated,hesaid.“Nobody’sgoingtodropdeadovernight2butweshouldbeaskingformorescientificinformation，”RobertBellsaidataconferenceonthehealtheffectsoflow-levelradiation.1C　“Ifmobilephonesarefoundtobedangerous,theyshouldcarryawarninglabeluntilpropershieldscanbedevised,”hesaid.____

　　Areportwidelycirculatedamongthepublicsaysthatuptonowscientistsdonotreallyknowenoughtoguaranteetherearenoill-effectsonhumansfromelectromagneticradiation.AccordingtoRobertBell,thereare3.3millionmobilephonesinAustraliaaloneandtheyareincreasingby2,000aday3._2　B　Bytheyear20004itisestimatedthatAustraliawillhave8millionmobilephones：

nearlyoneforeverytwopeople._

　　Aswell,thereare2,000transmittertowersaroundAustralia,manyinhighdensityresidentialareas5._3　E　Forexample,Telstra,OptusandVodaphonebuildtheirtowerswhereitisgeographicallysuitabletothemanddisregardtheneedofthecommunity.__Theelectromagneticradiationemittedfromthesetowersmayhavealreadyproducedsomeharmfuleffectsonthehealthoftheresidentsnearby.

　　RobertBellsuggeststhatuntilmoreresearchiscompletedtheGovernmentshouldbanconstructionofphonetowersfromwithina500metreradiusofschoolgrounds,childcarecentres,hospitals,sportsplayingfieldsandresidentialareaswithahighpercentageofchildren._4A　Hesaysthereisemergingevidencethatchildrenabsorblow-levelradiationataratemorethanthreetimesthatofadults6._Headdsthatthereisalsoevidencethatifcancersufferersaresubjectedtoelectromagneticwavesthegrowthrateofthediseaseaccelerates.

　_5D　Thenwhofinancestheresearch?

__AccordingtoRobertBell,itisreasonableforthemajortelephonecompaniestofundit.Besides,healsourgestheGovernmenttosetupawide-ranginginquiryintopossiblehealtheffects.

第二篇TheWorld'sLongestBridge

　　Rumorhasitthat1alegendarysix-headedmonsterlurksinthedeepwatersoftheTyrrhenian

　　SeabetweenItalyandtheislandofSicily.

（1）CIftrue,onedayyoumightspythebeastwhilezipping（呼晡而过）acrosstheMessinaStraitBridge.Whencompletedin2010,theworld'slongestbridgewillweighnearly300,000tons一equivalenttotheicebergthatsanktheTitanic—andstretch5kilometerslong.“That'snearly50percentlongerthananyotherbridgeeverbuilt.’，saysstructuralengineerShaneRixon.

　　（2BWhatdotheworld'slongestbridgeshaveincommon?

）They'resuspensionbridges,massivestructuresbuilttospanvastwaterchannelsorgorges.Asuspensionbridgeneedsjusttwotowerstoshoulderthestructure'smammothweight,thankstoheftysupportingcablesslungbetweenthetowersandanchoredfirmlyindeeppoolsofcementateachendofthebridge.TheMessinaStraitBridgewillhavetwo54，100-tontowers,whichwillsupportmostofthebridge'sload.Thebeefycablesofthebridge,each1.2meterindiameter,willholdupthelongestandwidestbridgedeckeverbuilt.

　　WhenconstructionbeginsontheMessinaStraitBridgein2005,thefirstjobwillbetoerecttwo370meter-tallsteeltowers.（3）EThesecondjobwillbetopulltwosetsofsteelcablesacrossthestrait,eachsetbeingabundleof44,352individualsteelwires.Gettingthesecablesupwillbesomething2.It'snotjusttheirlength—totally5.3kilometers—buttheirweight.'——（4）FTheywilltipupthescalesat166,500tons—morethanhalfthebridge'stotalmass.

Afterloweringvertical“suspender’，cablesfromthemaincables,builderswillerecta60meter-wide54,630-tonsteelroadway,ordeck—wideenoughtoaccommodate12lanesoftraffic.Thedeck'sweightwillpulldownonthecableswithaforceof70,500tons.Inreturn,thecablesyankupagainsttheirfirmlyrootedanchorswithaforceof139，000tons—equivalenttotheweightofabout100,000cars.Thoseanchorsareessential.（5）DThey'rewhatwillkeepthebridgefromgoinganywhere.

第三篇：

ReinventingtheTable

Anearthscientisthasrejiggedtheperiodictable1tomakechemistrysimplertoteachtostudents.

　　__1A.TherehavebeenmanyattemptstoredesigntheperiodictablesinceDmMMendeleev2drewitupin1871.__ButBruceRailsbackfromtheUniversityofGeorgiasaysheisthefirsttocreateatablethatbreakswithtraditionandshowstheionsofeachelementratherthanjusttheelementsthemselves.

　　“Igottiredofbreakingmyarmstryingtoexplaintheperiodictabletoearthstudents,”hesays,criss-crossinghishandsintheairandpointingtodifferentbitsofatraditionaltable.__2B.Railsbackhasstillorderedtheelementsaccordingtothenumberofprotonstheyhave.____Buthehasaddedcontourlinestochargedensity,helpingtoexplainwhichionsreactwithwhich.

　　"Geohemistsjustwantanintuitivesenseofwhat'sgoingonwiththeelements,"saysAlbertGalyfromtheUniversityofCambridge4,_3C.“Iimaginethiswouldbegoodforundergraduates.”____

　　____4D.Railsbackhaslistedsomeelementsmorethanonce.__Heexplainsthatsulphur,forexample,showsupinthreedifferentspots—oneforsulphide,whichisfoundinminerals,oneforsu1phite,andoneforsu1phate,whichisfoundinseasa1t,forinstance.

　　Hehasalsoinc1udedsymbolstoshowwhichionsarenutrients，andwhicharecommoninsoi1orwater.__5E.Andthesizeofelement’ssymbolreflectshowmuchofitisfoundintheEarth’scrust._

第四篇：

TheBilingualBrain

WhenKarlKimimmigratedtotheUnitedStatesfromKoreasateenager,hehadahardtimelearningEnglish.Nowhespeaksitfluently,andhehadauniqueopportunitytoseehowourbrainsadapttoasecondlanguage.Asagraduatestudent,KimworkedinthelabofJoyHirsch,aneuroscientistinNewYork.1FTheirworkledtoanimportantdiscovery.

Theyfoundevidencethatchildrenandadultsdon'tusethesamepartsofthebrainwhentheylearnasecondlanguage.

　　TheresearchersusedaninstrumentcalledanMRI（magneticresonanceimaging）scannertostudythebrainsoftwogroupsofbilingualpeople.2BOnegroupconsistedofthosewhohadlearnedasecondlanguageaschildren..Theotherconsistedofpeoplewho,likeKim,learnedtheirsecondlanguagelaterinlife.PeoplefrombothgroupswereplacedinsidetheMRIscanner.ThisallowedKimandHirschtoseewhichpartsofthebrainweregettingmorebloodandweremoreactive.Theyaskedpeoplefrombothgroupstothinkaboutwhattheyhaddonethedaybefore,firstinonelanguageandthentheother.Theycouldn'tspeakoutloudbecauseanymovementwoulddisruptthescanning.

　　KimandHirschlookedspecificallyattwolanguagecentersinthebrain-Broca'sarea~,whichisbelievedtocontrolspeechproduction,andWernicke'sarea,whichisthoughttoprocessmeaning.KimandHirschfoundthatbothgroupsofpeopleusedthesamepartofWernicke'sareanomatterwhatlanguagetheywerespeaking.3AButtheiruseofBroca'sareawasdifferent.

　　PeoplewholearnedasecondlanguageaschildrenusedthesameregioninBroca'sareaforboththeirfirstandsecondlanguages.PeoplewholearnedasecondlanguagelaterinlifeusedadifferentpartofBroca'sareafortheirsecondlanguage.4CHowdoesHirschexplainthisdifference?

Hirschbelievesthatwhenlanguageisfirstbeingprogrammedinyoungchildren,theirbrainsmaymixthesoundsandstructuresofalllanguagesinthesamearea.Oncethatprogrammingiscomplete,theprocessingofanewlanguagemustbetakenoverbyadifferentpartofthebrain.

　　Asecondpossibilityissimplythatwemayacquirelanguagesdifferentlyaschildrenthanwedoasadults.Hirschthinksthatmothersteachababytospeakbyusingdifferentmethodsinvolvingtouch,sound,andsight.5　EAndthatisverydifferentfromlearningalanguageinahighschoolorcollegeclass.

第五篇ARecord-BreakingRover

NASA’sMarsroverOpportunityhasboldlygonewherenoroverhasgonebefore-atleastintermsofdistance.____1F　SincearrivingontheRedPlanetin2004,Opportunityhastraveled25.01miles,morethananyotherwheeledvehiclehasonanotherworld.____OnJuly27,afteryearsofmovingaboutonMartianground,thegolf-cart-sizedOpportunityhaddrivenmorethan24miles,beatingthepreviousrecordholder-aSovietroversenttothemoonin1973.

　　“ThisissoremarkableconsideringOpportunitywasintendedtodriveabout1kilometerandwasneverdesignedfordistance,”saysJohnCallas,theMarsExplorationRoverProjectManager.____2B　HeworksatNASA’sJetPropulsionLaboratoryinPasadena,California.____“Butwhatisreallyimportantlyisnothowmanymilestheroverhasrackedup,buthowmuchexplorationanddiscoverywehaveaccomplishedoverthatdistance.”

　　OPPORTUNITY

　　Thesolar-poweredOpportunityanditstwinrover,Spirit,landedonMars10yearsagoonamissionexpectedtolast3months.____3ETheobjectiveoftheroverswastohelpscientistslearnmoreabouttheplanetandtosearchforsignsoflife，suchasthepossiblepresenceofwater.____SpiritstoppedcommunicatingwithEarthinMarch2010,afewmonthsafteritgotstuckinasandpit.ButOpportunityhascontinuedtocollectandanalyzeMartiansoilandrocks.

　　Duringitsmission,Opportunityhascaptured,andsentbacktoEarth,some187,000panoramicandmicroscopicimagesofMarswithitscameras.____4AIthasalsoprovidedscientistswithdataontheplanet’satmosphere,soil,rocks,andterrain.____MARATHONROVER

　　Therover