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【福建省厦门市2024届高三上学期第一次质量检测英语试题】
C
Imaginebeingabletouseenergyfromthesunallthetime,evenwhenitsnight.ThatstheideathatscientistsatCaltech（CaliforniaInstituteofTechnology）areexploring.TheyreworkingoncollectingsunlightinspaceandsendingitsenergytoEarth.
Caltechsscientistshavecreatedaspecialtoolforthisproject.TheycallitMAPLE.MAPLEandtwootherdevicesarepartofaprojectthatwassentintospaceinJanuary,2023.MAPLEsjobistotesttheideaofsendingenergywirelesslyfromspacetoEarth.Wereusedtousingwirestomoveelectricalenergyfromoneplacetoanother.Butsendingenergywithoutwiresisalottrickier.
ThemethodusedbyCaltechsscientistsdependsonthewaywavesactwhentheymeet.Imaginetwowavescomingtogetherastheytravelinthesamedirection.Ifthetopsofthewaveslineup,theycombinetomakeabiggerwave.Butifthetopofonewavelinesupwiththelowpointoftheother,thewavescanceleachotherout.TheCaltechteamhasfoundawaytocontrolthetimingoflotsofmicrowavessothattheycancombinetheirpower,andfocustheenergyinonedirection.Itsalittlelikeusingamagnifying（放大的）glasstofocussunlightintoasmall,hotpointoflight.
Toprovethatthesystemcouldwork,MAPLEsentenergytotwodevicesjust30centimetersawayinspace.Thisenergywasthenturnedintoelectricity,whichmadetwosmalllightslightup.Next,MAPLEsentenergyallthewaydowntoalabatCaltech.Thescientistswereabletodetecttheenergy,provingthatitspossibletosendsolarenergytoEarthfromspace.
Dr.Hajimiri,oneoftheprojectsleaders,thinksthatoneday,thesystemcouldbeextremelyuseful,bringingenergytoplacesthatneedit,allovertheworld.Hebelievesthatinthefuture,wellbeabletosendenergytoremoteregionsandareasdestroyedbywarornaturaldisaster.
28.WhatisthechallengeinCaltechsprojectwithMAPLE?
A.Solar
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