227雅思考试 原文原题回忆.docx
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227雅思考试 原文原题回忆.docx
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227雅思考试原文原题回忆
Passage3Rainmaker
Sometimesideasjustpopupoutoftheblue.OrinCharliePaton’scase,outoftherain.“IwasinabusinMoroccotravellingthroughthedesert,”heremembers.“ithadbeenrainingandthebuswasfullofhot,wetpeople.Thewindowssteamedupandowenttosleepwithatowelagainsttheglass.WhenIwoke,thethingwassoakingwet.Ihadtowringitout.Anditsetmethinking.Whywasitsowet?
”
Theanswer,ofcourse,wascondensation.BackhomeinLondon,aphysicistfriend,PhilipDavies,explainedthattheglass,chilledbytherainoutside,hadcooledthehothumidairinsidethebusbelowitsdewpoint,causingdropletsofwatertoformontheinsideofthewindow.Intrigued,Paton----alightingengineerbyprofession----startedrigginguphisownequipment.“Imademyownsolarstills.Itoccurredtomethatyoumightbeabletoproducewaterinthiswayinthedesert,simplybycoolingtheair.Iwonderedwhetheryoucouldmakeenoughtoirrigatefieldsandgrowcrops.”
Today,adecadeon,hisdreamhastakenshapeasagiantgreenhouseonadesertislandoffAbuDhabiinthePersianGulf-----thefirstcommerciallyviableversionofhis“seawatergreenhouse.”Localscientists,workingwithPatonunderalicencefromhiscompanyLightWorks,arewateringthedesertandgrowingvegetablesinwhatisbasicallyagiantdew-makingmachinethatproducesfreshwaterandcoolairfromsunandseawater.InawardingPatonfirstprizeinadesigncompetitiontwoyearsago,MacroGoldschmied,presidentoftheRoyalInstitutionofBritishArchitects,calledit“atrulyoriginalideawhichhasthepotentialtoimpactonthelivesofmillionsofpeoplelivingincoastalwater-starvedareasaroundtheworld.”
Thedesignhasthreemainparts(seeGraphic).Thegreenhousefacesintotheprevailingwindsothathot,drydesertairblowsinthroughthefrontwallofperforatedcardboard,keptwetandcoolbyaconstanttrickleofseawaterpumpedupfromthenearbyshoreline.Theevaporatingseawatercoolsandmoistenstheair.LastJune,forexample,whenthetemperatureoutsidetheAbuDhabigreenhousewas46℃.Thecool,moistairallowstheplantstogrowfaster,andbecausemuchlesswaterevaporatesfromtheleavestheirdemandformoisturedropsdramatically.Paton’scropsthrivedonasinglelitreofwaterpersquaremetreperday,comparedto8litresiftheyweregrowingoutside.
Thesecondfeaturealsocoolstheairfortheplants.Patonhasconstructedadouble0layeredroofwithanouterlayerofclearpolytheneandaninner,coatedlayerthatreflectsinfraredlight.Visiblelightcanstreamthroughtomaximizephotosynthesis,whileheatfromtheinfraredradiationistrippedinthespacebetweenthelayers,awayfromtheplants.
Atthebackofthegreenhousesitsthethirdelementthemainwater-productionunit.Justbeforeenteringthisunit,thehumidairofthegreenhousemixeswiththehot,dryairfrombetweenthetwolayersoftheroof.Thismeanstheaircanabsorbmoremoistureasitpassesthroughasecondmoistcardboardwall.Finally,thehotsaturatedairhitsacondenser.Thisisametalsurfacekeptcoolbystillmoreseawater-----theequivalentofthewindowonPaton’sMoroccanbus.Dropsofpuredistilledwaterformonthecondenserandflowintoatankforirrigatingthecrops.
Thegreenhousemoreorlessrunsitself.Sensorsswitcheverythingonwhenthesunrisesandalterflowsofairandseawaterthroughthedayinresponsetochangesintemperature,humidityandsunlight.Onwindlessdays,fansensureaconstantflowofairthroughthegreenhouse.“Onceitistunedtothelocalenvironment,youdon’tneedanyonethereforittowork,”saysPaton.“Wecanruntheentireoperationoffone13-ampplug,andinfuturewecouldmakeitentirelyindependentofthegrid,poweredfromafewsolarpanels.”
Theneteffectistoevaporateseawaterintohotdesertair,thenrecondensethemoistureasfreshwater.Atthesametime,coolmoistairflowsthroughthegreenhousetoprovideidealconditionsforthecrops.Thekeytotheseawatergreenhouse’spotentialisitsuniquecombinationofdesalinationandairconditioning.Bytappingthepowerofthesunitcancoolasefficientlyasa500-kilowattairconditionerwhileusinglessthan3kilowattsofelectricity.Inpractice,itevaporates3000litresofseawateradayandturnsitintoabout800litresoffreshwater---justenoughtoirrigatetheplants.Therestislostaswatervapour.
Criticspointoutthatconstructioncostsof£25persquaremetremeanthewateristwiceasexpensiveaswaterfromaconventionaldesalinationplant.Butthecomparisonismisleading,saysPaton.Thenaturalairconditioninginthegreenhousemassivelyincreasesthevalueofthatwater.Becausetheplantsneedonlyaneighthofthewaterusedbythosegrownconventionally,theeffectivecostisonlyaquarterthatofwaterfromastandarddesalinator.Andcostsshouldplummetwhenmassproductionbegins,headds.
Bestofall,thegreenhouseshouldbeenvironmentallyfriendly.“Isupposetheremightbeaestheticobjectionstolargestructuresoncoastalsites,”saysHarris,“butitisacleantechnologyanddoesn’tproducepollutionorevenlargequantitiesofhotwater.”
T/F/NG
1.Patoncameupwiththeideaofmakingwaterindesertbypureaccident.
2.ThebusPatonrodeinhadpoorventilationbecauseofbrokenfans.
3.Patonwokeupfromsleeptodiscoverthathistowelwaswet.
4.Patonstartedhisgreenhouseprojectimmediatelyaftermeetingupwithhisfriend.
5.PatonlateropenedhisownbusinessinthePersianGulf.
Diagram
Summary
ThegreenhousePatonbuiltisinstalledwith_____tokeeptheairflowingifthewindstandsstill,anditisexpectedinthefuturetorelyonelectricityprovidedsolelyby_____.Despitethehighconstructioncostscomparedtodesalinationplant,theplantsgrowninPaton’sgreenhouseneedmuchlesswater,andifproducedinlargequantitiesthe_____couldbereducedremarkably.Inadditiontoalltheseadvantages,itisalso_____,becauseitiscleanandpollutionfree.
Passage2Thecolorofbutterfly
Whichparagraphcontainsthefollowinginformation?
1.Toughcommentonflightheighttheoryofbutterfly
2.ProvedwhyBeccalonididasurveyinEcuador
3.Specificmimicryringfliesatspecificheight
4.ThewayofcatchingbutterfliesbyBeccaloni
5.Mimicrypatternsarenotalwaysmeantoxicthings
T/F/NG
6.Allbutterflies’coloursofwingssendawarningmessagetootherpeoples.
7.Butterflies’wingpatternmaybeimitatedbyinsectsaswell.
8.Flyingaltitudeofthebutterflyisrelatedtotheirfood.
9.Beccalonisupportedflightheighthypothesisanddeterminedtoproveitsvalidity.
10.JatunSachahasthewidestrangeofbreedsintheworld.
11.Beccalonikeepsclearerrecordsonwherethebutterflywascaughtthananyoneelse.
ChoosethecorrectletterA,B,CorD
12.Whichiscorrectaboutbutterflies’fightaltitude?
A.Flightheighttheoryisalreadyassured.
B.Butterfliesalwaysflyataninvariablealtitude.
C.Itseemstobethesameasairplane’sflyingphenomenon.
D.Eachbutterfly’sfavorableheightisdifferent.
13.WhichiscorrectaboutBeccaloni’snextresearchafterflightheight?
A.Somecertainstatisticshavealreadybeenassembled.
B.Hetriedtofindconnectionsbetweenlarvalheightandadultones.
C.It’sveryhardtocultivatebutterflylarval.
D.Eachlarvalhasitsownfavorablekindoftrees.
Passage1
Whichparagraphcontainsthefollowinginformation?
1.Atheoryexplaineddelayhappenswhenselectingonereason.
2.Differentagegroupsrespondtoimportantthingsdifferently.
3.Conflictshappenedwhenvisualandaudioelementsemergesimultaneously.
4.Anexperimentdesignedtodemonstrateblocksformultitasking.
5.Aviewpointfavorsoptimisticsideofmultitaskingperformance.
ChoosethecorrectletterA,B,CorD
6.WhichoneiscorrectaboutexperimentconductedbyReneMaris?
A.Participantsperformedpoorlyonlisteningtasksolely.
B.Volunteerspresseddifferentkeysondifferentcolors.
C.Participantsneededtousedifferentfingersondifferentcoloredobjects.
D.Theydidabetterjobonmixedimagesandsoundinformation.
7.WhichstatementiscorrectaboutthefirstlimitationofMarois’sexperiment?
A.“Attentionalblink”takesabouttenseconds.
B.Lagoccursifweconcentrateononeobjectwhilesecondoneappears.
C.Wealwayshavetroubleinreactingthesecondone.
D.Firstlimitationcanbeavoidedbycertainmeasures.
8.WhichoneisNOTcorrectaboutMeyer’sexperimentandstatements?
A.Peoplecanexecutedual-taskjustafterseveralattempts.
B.Practicecanovercomedual-taskinterference.
C.MeyerholdsadifferentopiniononMarois’stheory.
D.Anexistingprocessordecideswhetherdelayanothertaskornot.
T/F/NG
9.Longergapbetweentwopresentingtasksmeansshorterdelaytowardthesecondone.
10.Peopletendtoignorethedifferenceswhenpresentedtwosimilarimages.
11.Maroishasdifferentopinionontheclaimthattrainingremovesbottleneckeffect.
12.MultitaskingperformancehascorrelationwithgenderaccordingtoArtMramer.
13.Authordoesn’tbelievethatpracticecouldbringanyvariation.
Don’tforgettofollowusonourofficialWechatAccount:
yasiyuedu365
Wewillsendmoretips。
Thankyou
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