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1、汕头市2013年普通高中高三教学质量测评试题（二）英语阅读理解原文4篇及中文译文AGreeninvadersaretakingoverAmerica.Nope,notinvadersfromspace.Plants.Youmightnotthinkofplantsasdangerous,butinthiscasetheyarethreateningnature'sdelicatefoodweb.Theinvadersareplantsfromothercountriesbroughtheretom
2、akegardensandyardslookpretty.EversincepeoplestartedtoarriveonAmerica'sshores,they'vecarriedalongtrees,flowers,andvegetablesfromotherplaces.Nowtherearesomanyofthoseplants,theyarecrowdingoutthenativeplantsthathavelivedheresincebeforehumansettlersarrived
3、.Andthat'saproblem,saysDr.DougTallamy.He'sanentomologist(aninsectexpert)attheUniversityofDelaware.Heexplainsthatalmostalltheplant-eatinginsectsintheUnitedStates—90%ofthem—arespecialized.Thatmeanstheyeatonlycertainplants.Prettyorangeandblackmonarchbutt
4、erflies,forexample,canonlydineononeplant:milkweed.Ifpeoplecutdownmilkweedandreplaceitwithsomethingelse,thebutterfliesstarve,becausetheirbodiescannotacceptanyotherfood.Butthetroubledoesn'tstopthere,itgoesrightacrossthefoodweb.Wheninsectscan'tgettherigh
5、tplantstoeatandtheydieoff,thenthebirdsdon'thaveenoughbugsfortheirmeals.Tallamypointsoutthatalmostallmigratingbirdsdependoninsectstofeedtheiryoung."Wecannotlettheplantsandanimalsaroundusdisappear,"saysTallamy."Thewaytopreservethemistogivethemfoodtoeat.
6、Butwhenweplantnon-nativeplants,weareclobberingthefoodweb,becausethenwedon'thavetheinsectsthebirdsneedtolive."Feweroftherightplantsmeanfewerbugs,andfewerbugsmeanfewerbirds.Andthat'sbadfortheEarth,becauseweneedavarietyoflivingthingstokeeptheplanethealth
7、yandbeautiful.Thegoodnewsis,gardenerseverywhereareworkinghardtoprotectnativeplantsandgetridoftheinvaders.Manylocalgardencenterssellnativeplants."JustGoogle'nativeplants'andyourlocation,andyoucanfindoutwhichplantsreallybelongwhereyoulive,"saysTallamy.P
8、lantingtherightthingsmakesarealdifference,andfast.Hedescribesplantingmilkweedinatinycitycourtyardaboutthesizeofalivingroomonespring.Bysummertime,thatmilkweedpatchhadproduced50newmonarchbutterflies!Tallamyencourageskidstogooutandplantnativeplan
