阅读理解WhenyouwatchTVprogramsaboutwildanimalsitissurprisingtoseehowanantelopecanescapealion'sattack．Inthewildernesseveryonehasastunt(绝招)．Evenplantshavetheirownwaysoffightingoff

Question

阅读理解

　　

When you watch TV programs about wild animals it is surprising to see how an antelope can escape a lion's attack．In the wilderness everyone has a stunt(绝招)．

　　

Even plants have their own ways of fighting off enemies．

　　

Over millions of years of evolution plants have developed a unique defence system(独特的防御系统)．Chemicals are wildly used for survival．By making their leaves flowers roots and fruits distasteful or poisonous to enemies plants can fight back．

　　

One such plant is the Golden Wattle tree(金合欢树)．British scientists David Cameron has found that when an animal eats the tree's leaves the amount of poison increases in the other leaves．“It's like the damaged leaves telephoning the others and telling them to fight together against the enemy ” he said．

　　

The tree also sends defence messages to neighbouring plants by giving out a special smell．Other Golden Wattle trees within a distance of 45 meters will get the message and produce more poison within 10 minutes．Now if an enemy eats too many of the trees' leaves it will die．

　　

Every species of plant or tree is good at producing a particular set of chemical．A herbivore that can survive after eating the leaves of one tree may be poisoned by its neighbor．

　　

In this way plants have developed not only individual defence systems but also shared it with others which makes it impossible for a single animal to destroy even a small area of forest．

(1)

Which of the following can be the best title of the passage?
[　　]
A．	Plants Fight Back with Poisons
B．	Plants Can Kill Animals
C．	Animals and Plants
D．	Lions and Antelopes

(2)

According to the study if one Golden Wattle tree is attacked by animals it can ________．
[　　]
A．	tell other trees to protect it
B．	produce more poison within 10 minutes
C．	send defence messages to the neighbouring plants
D．	kill the animals with its leaves

(3)

In this passage the underlined word “herbivore” probably means animals which ________．
[　　]
A．	live on both animals and plants
B．	feed on smaller animals
C．	live on trees
D．	feed on plants or grass

(4)

The last paragraph of the passage suggests that this kind of defence system ________．
[　　]
A．	does great harm to the animals
B．	does good to the forests
C．	is helpful to some animals
D．	harms the forests

Answer 1

答案：1．A;2．C;3．D;4．B;