全科学习资料,尽掌在手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
Evenplantshavetheirownwaystofightoffenemies
Overmillionsofyears,plantshavedevelopedtheirowndefensesystem(防卫系统)
Chemicalsarefantasticallyusedbyplantstosurvive(幸存)
Bymakingtheirleaves,flowers,rootsandfruitspoisonous(有毒的)toenemies,plantscanfightback
OnesuchplantistheGoldenWattletree
TheBritishscientistDavidCameronhasfoundwhenananimaleatsthetree’sleaves,theamount(数量)ofpoisonincreasesintheotherleaves
“It’sliketheinjuredleavestelephoningtheotherstofighttogetheragainsttheenemy,”hesaid
Thetreealsosendsdefensemessagestoneighboringplantsbygivingoutaspecial