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1、--科普环保类专项练习学校:___________姓名：___________班级：___________考号：___________题号一总分得分评卷人得分一、阅读理解WhenyouwatchTVprogramsaboutwildanimals,itissurprisingtoseehowanantelope(羚羊)canrunawayfromastronglion.Inthewilderness,everyonehashisownwaytoprotecthimself.Evenplantshavetheirownwaystofightoff
2、enemies.Overmillionsofyears,plantshavedevelopedtheirowndefensesystem(防卫系统).Chemicalsarefantasticallyusedbyplantstosurvive(幸存).Bymakingtheirleaves,flowers,rootsandfruitspoisonous(有毒的)toenemies,plantscanfightback.OnesuchplantistheGoldenWattletree.TheBritishscientistDavidCamero
3、nhasfoundwhenananimaleatsthetree’sleaves,theamount(数量)ofpoisonincreasesintheotherleaves.“It’sliketheinjuredleavestelephoningtheotherstofighttogether----againsttheenemy,”hesaid.Thetreealsosendsdefensemessagestoneighboringplantsbygivingoutaspecialsmell.GoldenWattletreesinthene
4、arby45meterswillgetthemessageandproducemorepoisonwithin10minutes.Now,ifanenemyeatstoomanyofthetrees’leaves,hewilldie.Everykindofplantortreeisgoodatproducingaspecialsetofchemicals.Herbivores,likerabbits,cansafelyeattheleavesofonetree,buttheymaybepoisonedbyitsneighbor.Inthiswa
5、y,plantshavenotonlydevelopedtheirowndefensesystem,butalsoshareditwithothers.Thismakesitimpossibleforasingleanimaltodestroyevenasmallareaofforest.1．Fromthefirst2paragraphs,wecanlearnthat_________.A.plantscandonothingagainsttheirenemiesB.chemicalsarequiteusefulforplantstosurvi
6、veC.anantelopecanalwaysrunawayfromastronglionD.leaves,roots,flowersandfruitsofplantsarepoisonous2．IfanimalseatoneGoldenWattletree’sleaves,thetreecan________.A.killtheanimalswithaspecialsmell----B.tellothertreestocometoprotectitC.warnothertreesagainsttheanimalsonthephoneD.sen
7、ddefensemessagestotheneighboringplants3．Theunderlinedword“herbivores”inthe5thparagraphprobablymeansanimalswhich_____.A．producepoison B．liveonsmallanimalsC．liketoeatrabbits D．feedonplantsorgrass4．Thelastpar
8、agraphofthepassagesuggeststhatthiskindofdefensesystemis________.A．badforani
