When you watch TV programs about wild animals, it is surprising to see how an antelope can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have 题目和参考答案——青夏教育精英家教网—

题目内容

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.

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 survive

C. an antelope can always run away from a strong lion

D. leaves, roots, flowers and fruits of plants are poisonous

2.If animals eat one Golden Wattle tree’s leaves, the tree can________.

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

3.The underlined word “herbivores” in the 5th paragraph probably means animals which _____.

A．produce poison B．live on small animals

C．like to eat rabbits D．feed on plants or grass

4.The last paragraph of the passage suggests that this kind of defense system is ________.

A．bad for animals B．good for forests

C．helpful to some animals D．harmful to forests

5.The passage is mainly about __________.

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

【答案】

1.B

2.D

3.D

4.B

5.C

【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.

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.

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.

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.

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.

5.这篇短文主要介绍了植物用来抵御天敌的方法.故选C.

练习册系列答案

Some students think it d__【小题1】___ to learn English well. That’s b__【小题2】__ they don’t find the right way. I think r__【小题3】___ is very important for students. The more you read， the b__【小题4】__ you’ll understand. Reading is helpful to listening, speaking and writing.
If you often read English aloud, you’ll improve(提高) your listening. On the other hand（另一方面）, listening a lot can h__【小题5】____ you to read better. Reading English everywhere when you are f_【小题6】__, if you wish. You can get a lot of knowledge（知识） when you read. Sometimes you need to s_【小题7】__ your ideas, you can either speak or write. That means you are using w__【小题8】__ you learned from reading. The same as Chinese, the more you read, the better you can write. If you want to r__【小题9】__ something, you should read again and again. So from now on, you’d better do more reading. It’s a good w__【小题10】__ to learn English well.

Now students' English handwriting（书法）gets worse and worse. That makes their teachers feel worried. Is your English handwriting beautiful? If n  【小题1】, here are four steps that really work!
Use paper with lines
Using paper with lines can keep you writing straight i  【小题2】 of up or down when you write English words or sentences. Those lines on the paper can help you to write words in the right size. Be s  【小题3】 to fill the lined space completely. And make sure those capital letters(大写字母) are written properly.
Slow down
If your writing is hard to read, try slowing down a little. For some kids, going slower makes the handwriting clear. If you write too q  【小题4】, it's hard for you to stop where you should, and even worse, you may make more m  【小题5】.
Hold your pencil right
When you hold your pencil the correct way, writing is much e  【小题6】. Some kids press down really hard when they write. That makes the handwriting not nice. Try to be relaxed and don't hold the pencil so hard. Let your writing appear nice and clean. If you do so, people will guess you are a student w 【小题7】 a good habit.
Draw more pictures
Drawing can improve your handwriting. You need to use the skills to control your pencil better w  【小题8】 you are drawing pictures. Even though you have no chance to draw at school, you can practice by y  【小题9】 at home.
Handwriting is very important. Imagine you are a world-famous movie star or a well-known sports player, what do you do when your f  【小题10】 run up to you? Give them your autographs(亲笔签名), of course!

短文填空，根据短文内容及所给首字母提示写出所缺单词, 并将完整单词填在下面对应题号后的横线上。

There was an old man who loved money very much . He n 1. gave anything to anybody . After some years he became r 2. .

One day he was walking near the river with hia friends when he fell into the river . His friends ran to help him . One of them held out his hand and cried , “ Give me your hand , and I’ll p 3. you out !” The rich

m 4. head went down the water a 5. then came up again , but he did not g 6.his hand to his friend . Again another of his friends tried , but again the s 7.thing happened .

Then a 8.friend , Nasreddin , said , “ Take my hand and “I’ll pull you out !” The rich man took his hand and Nasreddin pulled him out of the water .

“You don’t know your friend very w 9.. ” Nasreddin said to the others . “ When you say ‘ Give !’ to him , he d 10.nothing , but when you say ‘Take !’ , eh always takes.”

首字母填空

Only Mother’s Love is true love. It gives everybody everything all h___1____ life. When you are still a baby, mother takes good care of you as much as p____2____. In your w___3___ hours, she always holds you in her arms. When you are ill, she stops her work right now to look after you day and night a______4_____ forgets about herself. When you are growing up day b____5____ day, she feels very happy. When you are old enough to go to school, mother still looks after you all the time. On cold winter days, she always tells you to put on more clothes. She always stands in the wind, w_____6____ for you back from school. When you hurry to leave home for school with little breakfast, she always feels w____7____ about you at home. She usually knows about your study and spends much money on your school things. When you do well at school, you will see the brightest smile on her face.

Mother is always ready to give everything she h____8______ to her children, n____9____ to receive. What true love that is in the w___10_____! We will remember Mother’s Love forever!

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