题目内容
One reaction to all the concern about tropical deforestation is a blank stare that asks the question,
"Since I don't live there, what does it have to do with me?"
The answer is that your way of life, wherever you live in the world, is tied to the tropics in many
ways. If you live in a house, wash your hair, eat fruits and vegetables, drink soda, or drive a car, you
can be certain that you are affected by the loss of tropical forests.
Biologically, we are losing the richest regions on earth when, each minute, a piece of tropical forest,
the size of ten city blocks, disappears. As many as five million species of plants, animals, and insects
(40 to 50 percent of all living things) live there, and are being lost faster than they can be found and
described. Their loss is immeasurable.
Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not
good enough. Today over half the world's commercial rubber is produced in Malaysia and Indonesia,
while the Amazon's rubber industry produces much of the world's four million tons. And rubber is an
important material in making gloves, balloons, footwear and many sporting goods. Thousands of other
tropical plants are valuable for their industrial use.
Many scientists strongly believe that deforestation contributes to the greenhouse effect -or heating
of the earth from increased carbon dioxide in the atmosphere. As we destroy forests, we lose their
ability to change carbon dioxide into oxygen.
Carbon dioxide levels could double within the next half-century, warming the earth by as much as
4.5 degrees. The result? A partial melt-down of polar ice caps, raising sea levels as much as 24 feet;
even 15 feet could threaten anyone living within 35 miles of the coast. Unbelievable? Maybe. But
scientists warn that by the time we realise the severe effects of tropical deforestation, it will be 20
years too late.
Can tropical deforestation affect our everyday lives? Now, you should have got the answer.
B. tropical materials
C. man-made material
D. commercial rubber
B. persuade people to buy something synthetic
C. show us how important it is to protect the tropical forests
D. let people realise the effect of tropical deforestation
B. Many of our daily uses are related to the tropical forests.
C. Tropical plants can be used to make industrial products.
D. High carbon dioxide levels will make the earth warmer.
B. cold
C. supporting
D. opposed
B. the value of Tropical Forests
C. Tropical Forests and Our Life
D. The Greenhouse Effects W
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阅读理解(共20小题; 每小题2分,满分40分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
I felt encouraged by his words and began to swim more calmly.But my clothes stuck to me like a heavy weight.I could hardly stay above the surface.
Counsel saw this.“Shall I cut them?”he asked.
With a knife he cut my clothes from top to bottom and took them of quickly while I swam for both of us.
Then I did the same for Counsel,and we continued to swim near each other.
But we were in serious trouble.The crew(船员)might not have noticed our disappearance.
And if they had,they could not return because the rudder(舵)had broken.Counsel thought of all this,and calmly made his plans.We decided to wait for the ship as long as possible,because we had no other hope of safety.I suggested that we save our strength so that both of us would not be tired out at the same time.This was how we did it:While one of us lay on his back,quite still,with arms crossed and legs stretched out(伸直),the other would swim and push him along.We changed every ten minutes or so.In this way we could swim for hours,perhaps till daylight.The crash(破裂声)of the ship and the whale(鲸)had appeared at about eleven o’clock.We had about eight hours to swim before daylight.This seemed possible,if the sea remained calm.
【小题1】What happened to the man who told the story?
| A.He and his companion got into the water to test their strength. |
| B.He jumped into the water to save the broken rudder. |
| C.He was knocked into the water by his enemy. |
| D.He was thrown into the sea when the ship struck a whale. |
| A.Because no people helped them to take off their clothes. |
| B.Because they couldn’t take off their clothes on the sea. |
| C.Because they wanted to get rid of their clothes quickly. |
| D.Because they wanted to lifebuoys(救生圈)with their clothes. |
| A.not moving | B.even | C.yet | D.however |
| A.one of them pushed the other while swimming and then they changed |
| B.they both swam calmly |
| C.they crossed their arms and stretched their legs on the water |
| D.they lay on their backs instead of swimming |
| A.Neither of the two men was good swimmers. |
| B.The sea was calm before eleven o’clock that night. |
| C.The story took place at night. |
| D.The two men had to swim eight hours to catch up with the ship. |