Trees are useful to man in three very important ways: they p..

第1题

What had been the principal use of the antlers？A．To help in removing trees and bushes to c

What had been the principal use of the antlers？

A．To help in removing trees and bushes to cultivate the land.

B．To obtain the material for useful tools.

C．To prepare the fields for fanning.

D．To make many artifacts useful in dally life.

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第2题

听力原文：Look at these trees around my office! They're useful because they cut down on the

need for air-conditioning in my office in summer.

(24)

A．The trees are being cut down.

B．The trees are blocking my view.

C．The trees grow better around the office.

D．The trees help cool my office.

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第3题

Which of the following diagrams is most useful in impact analysis:Aarrow diagramsBpreceden

Which of the following diagrams is most useful in impact analysis:

A arrow diagrams

B precedence diagrams

C decision trees

D Pareto diagrams

E cause and effects diagrams

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第4题

What had been the principal use of the antlers？A．To obtain the material for useful tools.B

What had been the principal use of the antlers？

A．To obtain the material for useful tools.

B．To prepare the fields for cultivation.

C．To help in removing trees and bushes so that land could be cultivated.

D．To make many objects useful in everyday life.

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第5题

听力原文：W: Those trees next to your house are beautiful.M: Yeah, and they're useful too.

听力原文：W: Those trees next to your house are beautiful.

M: Yeah, and they're useful too. They cut down on the need for air-conditioning.

Q: What does the man mean？

(16)

A．The trees are being cut down.

B．He needs more air-conditioning.

C．The trees help cool his house.

D．The trees are blocking his view.

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第6题

听力原文：W: Those trees next to your house am beautiful.M: Yeah, and they're useful too. T

听力原文：W: Those trees next to your house am beautiful.

M: Yeah, and they're useful too. They cut down on the need/or air-conditioning,

Q: What does the msn mean？

(16)

A．The trees axe being cut down.

B．The trees help cool his house.

C．He needs more air-conditioning.

D．The trees axe blocking his view.

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第7题

49Which of the following diagrams is most useful in impact analysis: A.arrow diagrams B.pr

49 Which of the following diagrams is most useful in impact analysis:

A. arrow diagrams

B. precedence diagrams

C. decision trees

D. Pareto diagrams

E. cause and effects diagrams

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第8题

131Which of the following diagrams is most useful in impact analysis: A.arrow diagrams B.p

131 Which of the following diagrams is most useful in impact analysis:

A. arrow diagrams

B. precedence diagrams

C. decision trees

D. Pareto diagrams

E. cause and effects diagrams

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第9题

Forests have always been useful and important to man who make use of them in many ways. Ev

ery day trees are serving man everywhere. Trees supply man with fruits and building materials in the form. of wood. Without trees it would be impossible to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds is made of wood. Trees can stop man from terrible heat. They're also useful in preventing good and rich top soil from being washed away during heavy rains.

If there were no trees, heavy rains would wash away the rich top soil that is so important to plants. The result is that the land will become a desert. There are plenty of desert areas in the world. A long time ago these desert areas used to be very rich areas, but man in the past had not enough knowledge about science of nature, they cut down too many trees in the area where they lived and never planted new ones. By and by the rich top soil was blown and washed away by strong winds and heavy rains. In the end the rich land changed into useless deserts where nothing could grow.

According to the passage, ______.

A．a long time ago, man did not know how to make use of wood

B．trees are not as useful as they were in the past

C．trees were more found in the past than they are today

D．people have 'always found trees useful

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第10题

Passage 3 （79)Trees are useful to man in three very important ways: they provide him woo

Passage 3

(79)Trees are useful to man in three very important ways: they provide him wood and other products, they give him shaded and they help to prevent drought and floods.

Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. In his eagerness to draw quick profit from the trees, he has cut them down in large numbers, only to find that with them he has lost the friends he had.

Two thousand years ago, a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became bare and poor. When the empire fell to pieces, the home country found itself faced by floods and starvation.

Even where a government realizes the importance of a plentiful supply of trees, it is difficult sometimes to make the people realize this. They cut down the trees but are too careless to plant and look after new trees. (80)So, unless the government has a good system of control, or can educate the people, the forests slowly disappear.

This does not only mean that there will be fewer trees. The results are even more serious: for where there are trees, their roots break the soil up, allowing the rain to sink in, and also bind the soil. This prevents the soil from being washed away. But where there are on trees, the rain falls on hard ground and flows away on the surface, and this causes floods and the rain carries away the rich topsoil in which crops grow. When all the topsoil is gone, nothing remains but worthless desert.

11. According to the passage, trees are useful to man mainly in three ways, the most important of which is that they can ______

A. keep him from the hot sunshine

B. prevent him from floods

C. make him draw quick profit from them

D. help him to keep from the attack of drought and floods

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第11题

These are useful to man in three important ways: They provide him with wood and other prod

ucts; They give him shade and they help to prevent drought (干旱) and floods. Unfortunately, in many parts of the world, in his eagerness to draw quick benefit from the tree, man has cut down a large number of trees. Even where a government realizes the importance of plentiful supply of trees, it is difficult for it to persuade the villagers to see this. So unless the government has a great system of control, or can educate the people, the forests slowly disappear.

The resaults are more serious: for where there are trees their roots break the soil allowing the rain to sink and also hold the soil, thus preventing it from being washed away easily, but where there are no trees, the soil becomes hard and poor.

The rain falls on hard ground and flows away on the surface, causing floods, and carry away with it the rich top soil in which crops grow so well. When all the top soil is gone, nothing remains but worthless desert.

The purpose that the writer wrote this article for is ______.

A．to tell people that trees are very useful to man

B．to warn people not to cut down trees any more

C．to warn that man mustn't destroy forests any more

D．to explain how trees help to prevent drought and floods

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Trees are useful to man in three very important ways: they provide him with wood and other