题目内容
1.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 45meters will get the message and produce more poison within 10minutes.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.
51.From the first 2paragraphs,we can learn thatB.
A.plants can do nothing against their enemies
B.chemicals are quite useful for plants to survive
C.an antelope can always run away from a strong lion
D.leaves,roots,flowers and fruits of plants are poisonous
52.If animals eat one Golden Wattle tree's leaves,the tree canD.
A.kill the animals with a special smell
B.tell other trees to come to protect it
C.warn other trees against the animals on the phone
D.send defense messages to the neighboring plants
53.The underlined word"herbivores"in the 5th paragraph probably means animals whichD.
A.produce poison B.live on small animals
C.like to eat rabbits D.feed on plants or grass
54.The last paragraph of the passage suggests that this kind of defense system isB.
A.bad for animals B.good for forests
C.helpful to some animals D.harmful to forests
55.The passage is mainly aboutC.
A.the examples of protecting forests
B.the balance between animals and plants
C.the ways of plants fighting against enemies
D.the relationship between lions and antelopes.
分析 这篇短文主要以几种植物为例,讲述了植物的自保方式:通过它们的叶、花、根和果实有毒反击敌人,相互联系对抗敌人,发出一种特殊的气味对抗敌人等.
解答 答案:51.B 细节归纳题.根据第二段内容及其第二行句子Chemicals are fantastically used by plants to survive (幸存).化学品对于植物的生存来说非常重要.可知化学品对于植物的生存来说非常重要.故选B.
52.D 细节理解题.根据第三段第二行句子It's like the injured leaves teleponing the others to fight together against the enemy,"he said.受伤的叶子给其它的叶子发信息来一起对抗敌人.可知这种树能给自己的邻居发送自保信息.故选D.
53.D 词义猜测题.根据下文like rabbits,can safely eat the leaves of one tree,像兔子一样,可以安全地吃树的叶子,可知这里herbivores指的是草食动物.故选D.
54.B 细节推理题.根据最后一段句子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.这样植物不仅发展了自己的防御系统,而且还与其它植物分享,这使得动物无法消灭一个小面积的森林.可知这种防御体系对于森林来说大有好处.故选B.
55.C 主旨归纳题.根据整篇文章内容及其第一段最后一句Even plants have their own ways to fight off enemies.甚至植物也有自己的方法来击退敌人.可知这篇短文主要介绍了植物用来抵御天敌的方法.故选C.
点评 做题时首先对原文材料迅速浏览,掌握全文的主旨大意.其次,细读题材,各个击破.掌握全文的大意之后,细细阅读材料后的问题,弄清每题要求后,带着问题,再回到原文中去寻找、捕获有关信息.
-only a little.( )
| A. | How many | B. | How much | C. | How often |
| A. | writer | B. | doctor | C. | dentist | D. | actor |