问题补充：
When you watch TV programs about wild animals, it is surprising to see how an antelope (羚羊) can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways to fight off enemies.
Over millions of years, plants have developed their own defense system (防卫系统). Chemicals are fantastically used by plants to survive (幸存). By making their leaves, flowers, roots and fruits poisonous (有毒的) to enemies, plants can fight back.
One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree’s leaves, the amount (数量) of poison increases in the other leaves. “It’s like the injured leaves telephoning the others to fight together against the enemy,” he said.
The tree also sends defense messages to neighboring plants by giving out a special smell. Golden Wattle trees in the nearby 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees’ leaves, he will die.
Every kind of plant or tree is good at producing a special set of chemicals. Herbivores, like rabbits, can safely eat the leaves of one tree, but they may be poisoned by its neighbor.
In this way, plants have not only developed their own defense system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.
【小题1】From the first 2 paragraphs, we can learn that . A．plants can do nothing against their enemies B．chemicals are quite useful for plants to surviveC．an antelope can always run away from a strong lionD．leaves, roots, flowers and fruits of plants are poisonous【小题2】If animals eat one Golden Wattle tree’s leaves, the tree can.A．kill the animals with a special smellB．tell other trees to come to protect itC．warn other trees against the animals on the phoneD．send defense messages to the neighboring plants【小题3】The underlined word “herbivores” in the 5th paragraph probably means animals which .A．produce poisonB．live on small animalsC．like to eat rabbitsD．feed on plants or grass【小题4】The last paragraph of the passage suggests that this kind of defense system is .A．bad for animals B．good for forestsC．helpful to some animalsD．harmful to forests【小题5】The passage is mainly about . A．the examples of protecting forestsB．the balance between animals and plantsC．the ways of plants fighting against enemiesD．the relationship between lions and antelopesB
答案：
(答案→)B
解析：短文大意:这篇短文主要以几种植物为例,讲述了植物的自保方式.
【小题1】根据第二段Chemicals are fantastically used by plants to survive (幸存).描述,可知化学品对于植物的生存来说非常重要.故选B.
【小题2】根据第三段“It’s like the injured leaves telephoning the others to fight together against the enemy,” he said. 描述,可知这种树能给自己的邻居发送自保信息.故选D.
【小题3】联系下文like rabbits, can safely eat the leaves of one tree,可知此处指的是草食动物.故选D.
【小题4】根据短文最后一段描述,可知这种防御体系对于森林来说大有好处.故选B.
【小题5】这篇短文主要介绍了植物用来抵御天敌的方法.故选C.
