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1、IfyoutraveltoanewexhibitattheSanFranciscoConservatoryofFlowers阅读答案 IfyoutraveltoanewexhibitattheSanFranciscoConservatoryofFlowers,youwillhavechancestoseesomemeateatingplants.Takebladderworts,akindofsuchplant,forexample.Theyappearsosmallandgrowinaquietpond.Butthes
2、earethefastestknownkillersoftheplantkingdom,abletocaptureasmallinsectin1/50ofasecondusingatrapdoor! Oncethetrapdoorclosesonthevictim,theenzymes(酶)similartothoseinthehumanstomachslowlydigesttheinsect.Whendinnerisover,theplantopensthetrapdoorandisreadytotrapagain.
3、 Meateatingplantsgrowmostlyinwetareaswithsoilthatdoesn’toffermuchfoodvalue.Insuchconditions,theseamazingplantshavedevelopedinsecttrapstogettheirnutritionalneedsoverthousandsofAmericahasmoresuchplantsthananyothercontinent. Generallyspeaking,thetrapsmayhaveattracti
4、veappearancetofooltheeye,likepitcherplants,whichgettheirnamebecausetheylooklikebeautifulpitchers(acontainerlikeabottle)fullofnectar(花蜜). TheAsianpitcherplant,forexample,hasbrightcolorsandanattractivehalfclosedlid.Curiousinsectsaretemptedtocomecloseandtakeasip,and
5、thenslidedowntheslippery(光滑的)slopetotheirdeaths. Hairlikegrowthsalongthepitcherwallsensurethatnothingcabescape,andthedigestiveenzymescangettowork.Atinyinsectcanbedigestedinafewhours,butaflytakesacoupleofdays. Someofthesepitchersarelargeenoughtoholdtwogallons.Mea
6、teatingplantsonlyeatpeopleinsciencefictionmovies,butsometimesabirdorothersmallanimalswilldiscoverthatapitcherplantisn’tagoodplacetogetadrink. [语篇解读]本文是一篇说明文,介绍了一些特别的植物——靠捕食动物获得生长所需养分的“食肉植物”。 1.Fromthefirstparagraph,wecanknowthatbladderwortscan________. A.captur
7、e50smallinsectsinasecond B.captureaninsectintheshortesttime C.befoundfloatingonaquietlake D.digestaninsectin1/50ofasecond [解析]细节理解题。第一段指出,bladderworts能在1/50秒的时间内捕获一只小昆虫,是植物中已知的捕获动物速度最快的,因此选B。 [答案]B 2.Ifthetrapdoorofameateatingplantisclosed,theplant________.
8、 A.isfoolinginsectsintotakingasip B.isproducingnectar C.istemptinginsectstocomeclose D.isenjoyingadinner [解析]细节判断题。第二段说,一旦“陷阱门”将猎物关起来,类似于人胃里的