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2025高考英语大二轮专题强化练高考题型组合练作业13人与动植物类说明文作业13人与动植物类说明文
A
(2020·全国Ⅰ)
Theconnectionbetweenpeopleandplantshaslongbeenthesubjectofscientificresearch.Recentstudieshavefoundpositiveeffects.AstudyconductedinYoungstown,Ohio,forexample,discoveredthatgreenerareasofthecityexperiencedlesscrime.Inanother,employeeswereshowntobe15%more①productivewhentheirworkplacesweredecoratedwithhouseplants.
TheengineersattheMassachusettsInstituteofTechnology(MIT)havetakenitastepfurther—changingtheactualcompositionofplantsinordertogetthemtoperformdiverse,evenunusualfunctions.Theseincludeplantsthathavesensorsprintedontotheirleavestoshowwhenthey’reshortofwaterandaplantthatcandetectharmfulchemicalsingroundwater.“We’rethinkingabouthowwecanengineerplantstoreplacefunctionsofthethingsthatweuseeveryday,”explainedMichaelStrano,aprofessorofchemicalengineeringatMIT.
Oneofhislatestprojectshasbeentomakeplantsglow(发光)inexperimentsusingsomecommonvegetables.Strano’steamfoundthattheycouldcreateafaintlightforthree-and-a-halfhours.Thelight,aboutone-thousandthoftheamountneededtoreadby,isjustastart.Thetechnology,Stranosaid,couldonedaybeusedtolighttheroomsoreventoturntreesintoself-poweredstreetlamps.
Inthefuture,theteamhopestodevelopaversionofthetechnologythatcanbesprayedontoplantleavesina②one-offtreatmentthatwouldlasttheplant’slifetime.Theengineersarealsotryingtodevelopanonandoff“switch”wheretheglowwouldfadewhenexposedtodaylight.
Lightingaccountsforabout7%ofthetotalelectricityconsumedintheUS.Sincelightingisoftenfarremovedfromthepowersource—suchasthedistancefromapowerplanttostreetlampsonaremotehighway—alotofenergyislostduring③transmission.Glowingplantscouldreducethisdistanceandthereforehelpsaveenergy.
1.Whatisthefirstparagraphmainly
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