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2023年職稱英語(yǔ)真題理工(A)第1部分:詞匯選項(xiàng)(第1-15題,每題1分,共15分)下面每個(gè)句子中均有1個(gè)詞或者短語(yǔ)劃有底橫線,請(qǐng)為每處劃線部分?jǐn)M定1個(gè)意義最為接近的選項(xiàng)。1.Therulesaretoorigidtoallowforhumaneerror.A.inflexible?B.general C.complex?D.direct2.Thisspecieshasnearlydiedoutbecauseitshabitatisbeingdestroyed.A.turneddead?B.passedby C.carriedaway D.becomeextinct3.Thecontractbetwee(cuò)nthetwocompanieswillexpiresoon.A.shorten?B.end C.start D.resume4.Threeworld-classtennisplayerscametocontendforthistitle.A.argue?B.claim?C.wish?D.compete5.Themethodsofcommunicationusedduringthewarwereprimitive.A.simple B.reliable C.effective D.a(chǎn)lternat(yī)ive6.Respectforlifeisacardinalprincipleofthelaw.A.moral B.regular C.fundamental D.hard7.Thedrinkingwaterhasbecomecontaminatedwithlead.A.polluted B.treated?C.tested D.corrupted8.Comeout,orI’llbustthedoordown.A.shut B.set?C.break?D.beat9.Sheshedafewtearsatherdaughter’swedding.A.wiped?B.injected C.produced?D.removed10.Theydidn’tsee(cuò)mtoappreciatethemagnitudeoftheproblem.A.existence?B.importance?C.cause?D.situation11.Thetowerremainsintactevenaftertwohundredyears.A.unknown?B.unusual?C.undamaged?D.unstable12.Manyexpertsremainskepticalabouthisclaims.A.doubtful?B.untouched C.certain D.silent13.Theproposalwasendorsedbythemajorityofmembers.A.rejected?B.submitted C.considered?D.approved14.Rumorsbegantocirculateabouthisfinancialproblems.A.send?B.spread C.hear D.confirm15.Thepolicewillneedtokeepawaryeyeonthisareaoftown.A.naked B.cautious C.blind?D.private
第2部分:閱讀判斷(第16-22題,每題1分,共7分)NewUnderstandingofNaturalSilk’sMysteriesNaturalsilk,asweallknow,hasastrengththatman-mademat(yī)erialshavelongstruggledtomatch.InadiscoverythatsoundsmorelikeanancientChineseproverbthanamaterialssciencebreakthrough,MITresearchershavediscoveredthatsilkgetsitsstrengthfromitsweakness.Or,morespecifically,itsmanyweaknesses.Silkgetsitsextraordinarydurabilityandductility(柔韌性)fromanunusualarrangementofhydrogenbondsthatareintrinsicallyveryweakbutthatworktogethertocreateastrong,flexiblestructure.Mostmaterials—especiallytheonesweengineerforstrength—gettheirtoughnessfrombrittleness.Assuch,naturalsilkslikethoseproducedbyspidershavelongfascinatedbothbiologistsandenginee(cuò)rsbecauseoftheirlightweight,ductilityandhighstrength(poundforpound,silkisstrongerthansteelandfarlessbrittle).Butonitsface,itdoesn'tseemthatsilksshouldbeasstrongastheyare;molecularly,theyareheldtogetherbyhydrogenbonds,whicharefarweakerthanthecovalent(共價(jià)的)bondsfoundinothermolecules.Togetabetterunderstandingofhowsilkmanagestoproducesuchstrengththroughsuchweakbonds,theMITteamcreatedasetofcomputermodelsthatallowedthemtoobservethewaysilkbehavesattheatomiclevel.Theyfoundthatthearrangementofthetinysilknanocrystals(納米晶體)issuchthatthehydrogenbondsareabletoworkcooperatively,reinforcingoneanotheragainstexternalforcesandfailingslowlywhentheydofail,soasnotsoallowasuddenfracturetospreadacrossasilkstructure.Theresultisnaturalsilksthatcanstretchandbendwhileretainingahighdegreeofstrength.Butwhilethat'sallwellandgoodforspiders,beesandthelike,thisunderstandingofsilkgeometrycouldleadtonewmaterialsthatarestrongerandmoreductilethanthosewecancurrentlymanufacture.Ourbestandstrongestmat(yī)erialsaregenerallyexpensiveanddifficulttoproduce(requiringhightemperaturetreatmentsorenergy-intensiveprocesses).Bylookingtosilkasamodel,researcherscouldpotentiallydevisenewmanufacturingmethodsthatrelyoninexpensivematerialsandweakbondstocreatelessrigid,moreforgivingmaterialsthatarenonethelessstrongerthananythingcurrentlyonoffer.Andifyouthoughtyouweregoingtogetoutofthismaterialssciencestorywithouthearingaboutcarbonnanotubes(納米碳管),thinkagain.TheMITteamisalreadyinthelablookingintowaysofsynthesizingsilk-likestructuresoutofmaterialsthatarestrongerthannat(yī)uralsilk—likecarbonnanotubes.Super-silksareonthehorizon.16.MITresearcherscarryoutthestudytoillustrat(yī)eanancientChineseproverb.A.Right?B.Wrong?C.Notmentioned17.Silk’sstrengthcomesfromitsweakhydrogenbondsworkingtogether.A.Right B.Wrong?C.Notmentioned18.Biologistsandengineersareinterestedinunderstandingnaturalsilksbecausetheyareverylightandbrittle.A.Right B.Wrong C.Notmentioned19.Ifthehydrogenbondsbreakduetoexternalforces,theybreakfast.A.Right?B.Wrong?C.Notmentioned20.TheMITteamhadtrieddifferentmaterialsbeforetheystudiesnaturalsilkintheresearch.A.Right B.Wrong?C.Notmentioned21.Carbonnanotubesarecurrentlythemostpopulartopicinmaterialsscience.A.Right?B.Wrong?C.Notmentioned22.inthefutureA.Right?B.Wrong C.Notmentioned下面的短文后有2項(xiàng)測(cè)試任務(wù):(1)第23~26題規(guī)定從所給的6個(gè)選項(xiàng)中為指定段落每段選擇1個(gè)最佳標(biāo)題;(2)第27~30題規(guī)定從所給的6個(gè)選項(xiàng)中為每個(gè)句子擬定一個(gè)最佳選項(xiàng)。BlackHoles1.Blackholescanbebestdescribedasasortofvacuum,suckingupeverythinginspace.Scientistshavediscoveredthatblackholescomefromanexplosionofhugestars.Starsthatareneardeathcannolongerburnduetolossoffuel,andbecauseitstemperaturecannolongercontrolthegravitational(重力的)force,hydrogenendsupputtingpressureontothestar’ssurfaceuntilitsuddenlyexplodesthencollapses.2.Blackholescomefromstarsthataremadeofhydrogen,othergasesandafewmetals.Whentheseexplodeitcanturnintoastellar-mass(恒星質(zhì)量)blackhole,whichcanonlyoccurifthestarislargeenough(shouldbebiggerthanthesun)fortheexplosiontobreakitintopieces,andthegravitystartstocompacteverypieceintothetiniestparticle.Trytoseeandcompare:ifastarthat’stentimesthesizeofthesunendsupbeingablackholethat(yī)’snolongerthan70kilometers,thentheEarthwouldbecomeablackholethat’sonlyafractionofaninch!3.Objectsthatgetsuckedinablackholewillalwaysremainthere,nevertobreakfree.Butrememberthat(yī)blackholescanonlygobbleup(吞噬)objectswithinaspecificdistancetoit.It’spossibleforalargestarnearthesuntobecomeablackhole,butthesunwillcontinuetostayinplace.Orbitsdonotchangebecausethenewlyformedblackholecontainsexactlythesameamountofmassaswhenitwasastar,onlythistimeitsmassistotallycontractedthatitcanendupasnobiggerthanastate.4.Sofar,astronomershavefiguredoutthatblackholesexistbecauseofAlbertEinstein’stheoryofrelativity.Intheend,throughnumerousstudies,theyhavediscoveredthatblackholestrulyexist.Sinceblackholestraplightanddonotgiveofflight,itisnearlyimpossibletodetectblackholesviaatelescope.Butastronomerscontinuetostudygalaxies,spaceandthesolarsystemtounderstandhowblackholesmightevolve.Itispossiblethatblackholescanexistformillionsofyears,andlatercontributetoabiggerprocessingalaxies,whichcaneventuallyleadtocreationofnewentities.Scientistsalsocreditblackholesashelpfulinlearninghowgalaxiesbegantoform.A.Isthereproofthatblackholesreallyexist?B.Whataredifferenttypesofblackholes?C.Howareblackholesformed?D.Howwereblackholesnamed?E.Whathappenstotheobjectsaroundablackhole?F.Whatareblackholesmadeof?23.Paragraph124.Paragraph225.Paragraph326.Paragraph427.Blackholesareformedafter.28.Whenalargestarexplodes,thegravitycompactseverypieceinto.29.Anewlyformedblackholeandthestaritcomesfromareof.30.AlbertEinstein’stheoryofrelativityhelpstoprove.A.thecreationofnewentitiesB.anexplosionofhugestarsC.thetiniestparticleD.thesameamountofmassE.theexistenceofblackholesF.afractionofaninch
第4部分:閱讀理解(第31-45題,每題3分,共45分)下面有3篇短文,每篇短文后有5道題。請(qǐng)根據(jù)短文內(nèi)容,為每題擬定1個(gè)最佳選項(xiàng)。第一篇ForecastingMethodsThereareseveraldifferentmethodsthatcanbeusedtocreateaforecast.Themethodaforecasterchoosesdependsupontheexperienceoftheforecaster,theamountofinformat(yī)ionavailabletotheforecaster,thelevelofdifficultythat(yī)theforecastsituationpresents,andthedegreeofaccuracyorconfidenceneededintheforecast.Thefirstofthesemethodsisthepersistencemethod;thesimplestwayofproducingaforecast.Thepersistencemethodassumesthattheconditionsat(yī)thetimeoftheforecastwillnotchange.Forexample,ifitissunnyand87degreestoday,thepersistencemethodpredictsthatitwillbesunnyand87degreestomorrow.Iftwoinchesofrainfelltoday,thepersistencemethodwouldpredicttwoinchesofrainfortomorrow.However,ifweatherconditionschangesignificantlyfromdaytoday,thepersistencemethodusuallybreaksdownandisnotthebestforecastingmethodtouse.Thetrendsmethodinvolvesdeterminingthespeedanddirectionofmovementforfronts,highandlowpressurecenters,andareasofcloudsandprecipitation.Usingthisinformation,theforecastercanpredictwhereheorshee(cuò)xpectsthosefeaturestobeatsomefuturetime.Forexample,ifastormsystemis1,000mileswestofyourlocat(yī)ionandmovingtotheeastat(yī)250milesperday,usingthetrendsmethodyouwouldpredictittoarriveinyourareain4days.Thetrendsmethodworkswellwhensystemscontinuetomoveatthesamespeedinthesamedirectionforalongperiodoftime.Iftheyslowdown,speedup,changeintensity,orchangedirection,thetrendsforecastwillprobablynotworkaswell.Theclimat(yī)ologymethodisanothersimplewayofproducingaforecast.Thismethodinvolvesaveragingweatherstatisticsaccumulatedovermanyyearstomaketheforecast.Forexample,ifyouwereusingtheclimatologymethodtopredicttheweatherforNewYorkCityonJuly4th,youwouldgothroughalltheweatherdatathathasbeenrecordedforeveryJuly4thandtakeanaverage.Theclimatologymethodonlyworkswellwhentheweatherpat(yī)ternissimilartothatexpectedforthechosentimeofyear.Ifthepatternisquiteunusualforthegiventimeofyear,theclimat(yī)ologymethodwilloftenfail.Theanalogmethodisaslightlymorecomplicatedmethodofproducingaforecast.Itinvolvesexaminingtoday'sforecastscenarioandrememberingadayinthepastwhentheweatherscenariolookedverysimilar(ananalog).Theforecasterwouldpredictthattheweatherinthisforecastwillbehavethesameasitdidinthepast.Theanalogmethodisdifficulttousebecauseitisvirtuallyimpossibletofindapredictanalog.Variousweatherfeaturesrarelyalignthemselvesinthesamelocationsastheywereintheprevioustime.Evensmalldifferencesbetweenthecurrenttimeandtheanalogcanleadtoverydifferentresults.31.WhatofthefollowingfactorsisNOTmentionedinchoosingaforecastingmethod?A.Necessaryamountofinformat(yī)ion.B.Degree(cuò)ofdifficultyinvolvedinforecasting.C.Practicalknowledgeoftheforecaster.D.Creativityoftheforecaster.32.ThepersistencemethodfailstoworkwellwhenA.itisrainy.B.itissunny.C.weatherconditionsstaystable.D.weatherconditionschangegreatly.33.ThetrendsmethodworkswellwhenA(yù).weatherfeaturesareconstantforalongperiodoftime.B.weatherfeaturesaredefinedwell.C.predictionsonprecipitationareaccurate.D.thespeedanddirectionofmovementarepredicable.34.TheanalogmethodshouldnotbeusedinmakingaweatherforecastwhenA.theanaloglookscomplicated.B.thecurrentweatherscenarioisdifferentfromtheanalog.C.theanalogismorethan10yearsold.D.thecurrentweatherscenarioisexactlythesameastheanalog.35.Historicalweat(yī)herdataarenecessaryinA.thepersistencemethodandthetrendsmethod.B.thetrendsmethodandtheclimatologymethod.C.theclimatologymethodandtheanalogmethod.D.Thepersistencemethodandtheanalogmethod.?第二篇StudentsLearnBetterWithTouchscreenDesksObservethecriticismsofnearlyanymajorpubliceducationsystemintheworld,andafewofthemanycomplaintsaremoreorlessuniversal.Technologymovesfasterthanthee(cuò)ducationsystem.Teachersmustteachatthepaceofthesloweststudentrat(yī)herthanthefastest.And—particularlyintheUnitedStates—schoolchildrenasagroupdon’tcaremuchfor,orexcelat(yī),mathematics.Soit’shearteningtolearnthatanewkindof“classroomofthefuture”showspromiseatmitigatingsomeoftheseproblems,startingwiththatfundamentalpieceofclassroomfurniture:thedesk.AUKstudyinvolvingroughly400students,mostlyaged8-10years,andanewgenerationofmulti-touch,multi-user,computerizeddesktopsurfacesisshowingthatoverthelastthreeyearsthetechnologyhasappreciablyboostedstudents’mathskillscomparedtopeerslearningthesamemat(yī)erialviat(yī)heconventionalpaper-and-pencilmethod.How?Throughcollaboration,mostly,aswellasbygivingteachersbettertoolsbywhichtomicromanageindividualstudentswhoneedsomeextrainstructionwhileallowingtherestoftheclasstocontinuemovingforward.Traditionalinstructionstillshowsrespectableefficacy(效力)atincreasingstudentsfluencyinmathematics,essentiallythroughmemorizationandpractice—dull,repetitivepractice.Buttheresearchershaveconcludedthatthesenewtouchscreendesksboostbothfluencyandflexibility—thecriticalthinkingskillsthat(yī)allowstudentstosolvecomplexproblemsnotsimplythroughknowingformulasanddevices,butbybeingabletofigureoutwhattherealproblemisandthemosteffectivemeansofstrippingitdownandsolvingit.Onereasonforthis,theresearcherssay,isthemulti-touchaspectofthetechnology.Studentsworkinginthenext-genclassroomcanworktogetherat(yī)thesametabletop,eachofthemcontributingandengagingwiththeproblemaspartofagroup.KnownasSynergyNet,thesoftwareusescomputervisionsystemsthatseeintheinfrared(紅外的)spectrumtodistinguishbetweendifferenttouchesondifferentpartsofthesurface,allowingstudentstoaccessandusetoolsonthescreen,moveobjectsandvisualaidsaroundontheirdesktops,andotherwisephysicallyinteractwiththenumbersandinformat(yī)ionontheirscreens.Byusingthesescreenscollaboratively,theresearcherssay,thestudentsaretosomeextentteachingthemselvesasthosewithastrongergraspondifficultconceptspullotherstudentsforwardalongwiththem.36.WhichofthefollowingstatementsisNOTtrueofthepubliceducat(yī)ionsystem?A.Itdoesnotcatchupwiththedevelopmentoftechnology.B.Teacherspaymoreattentiontofastlearnersthanslowlearners.C.Somesimilarcomplaintsaboutitareheardindifferentcountries.D.Manystudentsarenotgoodatlearningmathemat(yī)ics.37.Whathasbeenfoundafterthenewtechisemployed?A.Teachersareabletogiveindividualizedattentiontostudentsinneed.B.Studentsbecomelessactiveinlearningmat(yī)hematics.C.Studentsshowpreferencetotheconventionalpaper-and-pencilmethod.D.Thegapbetwee(cuò)nslowlearnersandfastlearnersgetmorenoticeable.38.Whatisthebenefitstudentsgetfromthenewtech?A.Itmakesthemmorefluentinpublicspeech.B.Itoffersthemmoreflexibilityinchoosingcourses.C.Itiseffectiveinhelpingthemsolvephysicalproblems.D.Itenablesthemtodevelopcriticalthinkingability.A.Everystudenthasanindividualtabletop.B.Studentsusedifferenttoolstointeractwitheachother.C.Themulti-touchfunctionstimulatesstudents.D.Thesoftwareinstalledautomaticallyidentifiesdifferentusers.A.Ithelpsfastlearnerstolearnfaster.B.Itmakesteachers’instructionunnecessary.C.Itenablesthemtoworktogether.D.Itallowsthewholeclasstolearnatthesamepace.
第三篇OntheTrailoftheHoneyBadgersOnarecentfieldtriptotheKalahariDesert,ateamofresearcherslearntalotmoreabouthoneybadgers(獾).Theteamemployedalocalwildlifeexpert,KitsoKhama,tohelpthemlocateandfollowthebadgersacrossthedesert.Theirmainaimwastostudythebadgers’movementsandbehaviourasdiscreetly(謹(jǐn)慎地)aspossible,withoutfrighteningthemawayorcausingthemtochangetheirnat(yī)uralbehaviour.Theyalsoplannedtotrapafewandstudythemcloseupbeforereleasingthem.Inviewoftheanimal’sreputation,thiswassomethingthatevenKhamawasreluctanttodo.“Theproblemwithhoneybadgersistheyarenaturallycuriousanimals,especiallywhentheysee(cuò)somethingnew,”hesays.“that,combinedwiththeirunpredictablenature,canbeadangerousmixture.Iftheysenseyouhavefood,forexample,theywon’tbeshyaboutcomingrightuptoyouforsomethingtoeat(yī).They’reactuallyquitesociablecreaturesaroundhumans,butassoonastheyfeeltheymightbeindanger,theycanbecomee(cuò)xtremelyvicious(兇惡的).Fortunatelythisisrare,butitdoeshappen.”Theresearchconfirmedmanythingsthatwerealreadyknown.Asexpected,honeybadgersateanycreaturestheycouldcatchandkill.Evenpoisonoussnakes,fearedandavoidedbymostotheranimals,werenotsafefromthem.Theresearchersweresurprised,however,bytheanimal’sfondnessforlocalmelons,probablybecauseoftheirhighwatercontent.Previouslyresearchersthoughtthat(yī)theanimalgotallofitsliquidrequirementsfromitsprey(獵物).Theteamalsolearntthat,contrarytopreviousresearchfindings,thebadgersoccasionallyformedloosefamilygroups.Theywerealsoabletoconfirmcertainresultsfrompreviousresearch,includingthefat(yī)thatfemalebadgersneversocializedwitheachother.Followingsomeofthemalebadgerswasachallenge,sincetheycancoverlargedistancesinashortspaceoftime.Somehuntingterritoriescovermorethan500squarekilometers.Althoughtheyseemhappytosharetheseterritorieswithothermales,thereareoccasionalfightsoveranimportantfoodsource,andmalebadgerscanbeasaggressivetowardseachotherastheyaretowardsotherspecies.Asthebadgersbecameaccustomedtothepresenceofpeople,itgavetheteamthechancetogetupclosetothemwithoutbeingthesubjectoftheanimal’scuriosity—ortheirsuddenaggression.Thebadgers’eatingpatterns,whichhadbeendisrupted,returnedtonormal.Italsoallowedtheteamtoobservemorecloselysomeoftheothercreaturesthatformworkingassociationswiththehoneybadger,astheseseemstoadoptthebadgers’relaxedattitudewhennearhumans.41.WhydidthewildlifeexpertsvisittheKalahariDesert?A.Tofindwherehoneybadgerslive.B.Toobservehowhoneybadgersbehave.C.Tocatchsomehoneybadgersforfood.D.Tofindoutwhyhoneybadgershaveabadreputation.42.What(yī)doesKitsoKhamasayabouthoneybadgers?A.Theyshowinterestinthingstheyarenotfamiliarwith.C.Theydonotenjoyhumancompany.D.Itiscommonforthemtoattackpeople.43.Whatdidtheteamfindoutabouthoneybadgers?A.Thereweresomecreaturestheydidnoteat.B.Theywereafraidofpoisonouscreatures.C.Theymaygetsomeofthewatertheyneededfromfruit.D.Femalebadgersdidnotmixwithmalebadgers.44.Whichofthefollowingisatypicalfeat(yī)ureofmalebadgers?A.Theydon’trunveryquickly.B.Theyhuntoveraverylargearea.C.Theydefendtheirterritoryfromotherbadgers.D.Theyaremoreaggressivethanfemales45.Whathappenedwhenhoneybadgersgotusedtohumansaroundthem?A.Theybecamelessaggressivetowardsothercreat(yī)ures.B.Theystartedeatingmore.C.Otheranimalsstartedworkingwiththem.D.Theylostinterestinpeople.
第5部分:補(bǔ)全短文(第46-50題,每題2分,共10分)下面的短文有5處空白,短文后有6個(gè)句子,其中5個(gè)取自短文,請(qǐng)根據(jù)短文內(nèi)容將其分別放回原有位置,以恢復(fù)文章面貌。ToadsareArthriticandinPainArthritisisanillnessthatcancausepainandswellinginyourbones.Toads,abigprobleminthenorthofAustralia,aresufferingfrompainfularthritisintheirlegsandbackbone,anewstudyhasshown.Thetoadsthatjumpthefastestaremorelikelytobelargerandtohavelongerlegs.46.Thelargeyellowtoads,nativetoSouthandCentralAmerica,wereintroducedintothenorth-easternAustralianstateofQueenslandin193Sinanattempttostopbeetlesandotherinsectsfromdestroyingsugarcanecrops.Nowupto200millionofthepoisonoustoadsexistinthecountry,andtheyarerapidlyspreadingthroughthestat(yī)eofNorthernTerritoryat(yī)arateofupto60kmayear.Thetoadscannowbefoundacrossmorethanonemillionsquarekilometers.47.AVenezuelanpoisonviruswastriedinthe1990sbuthadtobeabandonedafteritwasfoundtoalsokillnativefrogspecies.ThetoadshaveseverelyaffectedecosystemsinAustralia.Animals,andsometimespets,thateatthetoadsdieimmediat(yī)elyfromtheirpoison,andthetoadsthemselveseatanythingtheycanfitinsidetheirmouth.48.Aco-authorofthenewstudy,RickShine,aprofessorattheUniversityofSydney,saysthatlittleat(yī)tentionhasbee(cuò)ngiventotheproblemsthattoadsface.Rickandhiscolleaguesstudiednearly500toadsfromQueenslandandtheNorthernTerritoryandfoundthatthoseinthelat(yī)terstat(yī)ewereverydifferent.Theywereactive,sprintingdownroadsandbreedingquickly.Accordingtotheresultsofthestudy,thefastesttoadstravelnearlyonekilometreanight.49.Butspeedandstrengthcomeataprice—arthritisofthelegsandbackboneduetoconstantpressureplacedonthem.Inlaboratorytests,theresearchersfoundthat(yī)afterabout15minutesofhopping,arthritictoadswouldtravellessdistancewitheachhop.50.Thesetoadsaresoprogrammedtomove,apparently,that(yī)evenwheninpainthetoadstravelledasfastandasfarasthehealthyones,continuingtheirrelentlessmarchacrossthelandscape.A.Toadsarenotbuilttoberoadrunners—theyarebuilttositaroundpondsandwetarea.B.Thetasknowfacingthecountryishowtoremovethetoads.C.Furthermore,theysoontakeoverthenaturalhabitatsofAustralia’snativespecies.D.Toadswithlongerlegsmovefasterandtravellongerdistances,whiletheothersarebeingleftbehind.E.Butthisadvantagealsohasabigdrawback—upto10%ofthebiggesttoadssufferfromarthritis.F.Butarthritisdidn’tslowdowntoadsoutsidethelaboratory,theresearchersfound.
第6部分:完形填空(第51-65題,每題1分,共15分)下面的短文有15處空白,請(qǐng)根據(jù)短文內(nèi)容為每處空白擬定1個(gè)最佳選項(xiàng)。BetterSolarEnergySystems:MoreHeat,MoreLightSolarphotovoltaicthermalenergysystems,orPVTs,generatebothheat(yī)andelectricity,but(51)nowtheyhaven’tbeenverygoodattheheat(yī)-generatingpartcomparedtoastand-alonesolarthermalcollector.That’sbecausetheyoperateatlowtemperaturestocoolcrystallinesiliconsolarcells,(52)letsthesilicongeneratemoreelectricitybutisn’taveryefficientwaytogatherheat.That’saproblemofeconomics.Goodsolarhot-wat(yī)ersystemscanharvestmuchmoreenergythanasolar-electricsystemat(yī)asubstantiallylower(53).Andit’salsoaspaceproblem:photovoltaiccellscan(54)upallthespaceontheroof,leavinglittleroomforthermalapplications.Inapairofstudies,JoshuaPearce,anassociateprofessorofmaterialsscience
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