题目内容
Trees are useful to man in three very important ways: they provide him with wood and other products;they give him shade;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 without them he has lost the best 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 hard and poor. When the empire fell to pieces, the country found itself faced by floods and starvation.
Even though a government realizes the importance of a plentiful supply of trees, it is difficult for it to persuade the villager to see this. The villager wants wood to cook his food with, and he can earn money by making charcoal(木炭) or selling wood to the townsman(城市居民). He is usually too lazy or too careless to plant and look after trees. So unless the government has a good system of control, or can educate the people, the forests will slowly disappear.
This does not only mean that the villager’s sons and grandsons have 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 hold the soil, thus preventing it 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 carrying away with it the rich topsoil, in which crops grow so well. When all the topsoil is gone, nothing remains but a worthless desert.
1.The purpose that the writer wrote this article is to _________.
A. tell people the use of wood
B. tell people the function of tree roots
C. warn that man mustn’t destroy forests any more
D. explain how trees help man live a better life.
2. In the writer’s opinion, _________, or the forests will slowly disappear.
A. measures must be taken
B. people shouldn’t draw benefit from the tree
C. government must realize the serious results
D. unless no trees are cut down.
3.According to the article we know it is ________ to prevent the forests from slowly disappearing.
A. necessary but impossible B. necessary but difficult
C. impossible and unimportant D. difficult and impossible
4.In the last two paragraphs the writer wanted to make it clear that _________.
A. where there are no trees, the soil becomes poor but soft
B. where there are many trees, there are more floods
C. where there are no trees, the land might become desert slowly
D. floods will make the land become desert
1.C
2.A
3.B
4.C
【解析】略
In the decade(十年)of the 1970s, the United Nations organized several important meetings on the human environment to study a very serious problem.We humans are destroying the world around us.We must learn to protect them, or life will be very bad for our children and grandchildren.
There are several major aspects to this problem.
Population
Most problems of the environment come from population growth.In 1700 there were 635 million people in the world; in 1900 there were 1.6 billion; in 1950, 2.5 billion; and in 1980, 4.4 billion.In the year 2010 there will be 7.3 billion.More people need more water, more food, more wood, and more petroleum.
Distribution
Scientists say there is enough water in the world for everyone, but some countries have a lot of water and some have only a little.Some areas get all rain during one season.The rest of the year is dry.
Petroleum
We are using up the world’s petroleum.We use it in our cars and to heat our buildings in winter.Farmers use petrochemicals to make the soil rich.They use them to kill insects on those plants.These chemicals go into rivers and lakes and kill the fish there.Thousands of people also die from these chemicals every year.Chemicals also go into the air and pollute it.Winds carry this polluted air to other countries and other countries.
Poverty
Poor farmers use the same land over and over.The land needs a rest so it will be better next year.However, the farmer must have food every year.Poor people cut down trees for firewood.In some areas when the trees are gone, the land becomes desert.However, people need wood to cook their food now.Poor people cannot save the environment for the future.
We now have the information and the ability to solve these huge problems.However, this is not a problem for one country or one area of the world.It is a problem for all humans.The people and the nation of the world must work together to protect the world’s resources.No one controls the future, but we all help make it.
【小题1】According to the passage, our world is being destroyed mainly because ______.
A.pollution is getting worse and worse |
B.population are increasing greatly |
C.we humans are using up all of our natural resources |
D.distribution is not reasonable. |
A.having things in the right place at the right time. |
B.cutting down forests and selling them to other countries. |
C.building water systems to carry water to farms. |
D.conserving our natural resources |
A.The World Being Destroyed |
B.A Serious Problem We Should Pay Attention to |
C.Aspects That Destroyed Our World |
D.Conserving the World’s Natural Resources |