2. 自考
  3. An understanding of man’s effect on the balance of nature is crucial(关键的)to being able to find the appropriate remedial action.

An understanding of man’s effect on the balance of nature is crucial(关键的)to being able to find the appropriate remedial action.

admin2009-01-10  118
问题       An understanding of man’s effect on the balance of nature is crucial(关键的)to being able to find the appropriate remedial action. It is a very common belief that the problems of the population explosion are caused mainly by poor people living in poor countries who do not know enough to limit their reproduction. This is not true. The actual number of people in an area is not as important as the effect they have on nature. Developing countries do have an effect on their environment，but it is the populations of richer countries that have a far greater impact on the earth as a whole.  
      For example，tropical forests are known to be essential to the balance of nature，yet we are destroying them at a great rate. They are being cleared not to benefit the natives of that country，but to satisfy the needs of rich countries. Central American forests are being destroyed for grassland to make pet food in the United States cheaper；in Papua New Guinea，forests are destroyed to supply cheaper cardboard packaging for Japanese electronic products；in Burma and Thailand，forests have been destroyed to produce mole attractive furniture in Singapore and Hong Kong. Therefore，a rich person living thousands of miles away may cause more tropical forest destruction than a poor person living in the forest itself.  
     In short，it is everybody’s duty to safeguard the future of mankind-not only through population control，but by being more aware of the effect his actions have on nature. Nature is both fragile and powerful. It is very easily destroyed；on the other hand，it can easily destroy its most dangerous enemy-man.   
According to the first paragraph，people usually believe that______.
选项 A、poor people in poor countries contribute to the imbalance of nature
B、rich people know how to protect the environment by taking actions
C、people in poor areas know a lot about the birth control
D、rich people in rich countries have done a lot to balance nature
答案A
解析 见第一段第二句，贫穷地区的穷人不控制出生率，从而造成人口膨胀，打破自然环境的。
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