Question

阅读理解

　　It is only during the last few years that man has generally realized that in the world of nature a balance exists between all forms of life. No living thing can exist by itself：it is a part of a system in which all forms of life are joined together. If we change one part of the nature order, this will in its turn almost certainly bring about changes in some other part.

　　The cutting down of forests reduces the supply of oxygen. The killing of weeds and insects by chemicals leads to the wide－spread poisoning animals and birds. The throwing of waste products into the ocean does harm to life in the sea, while waste gasses change the chemical balance of the atmosphere.

　　And also we could go on, adding more examples, until in despair(绝望). We might feel like giving up the struggle to control and keep within limits these harmful human activities. Man is very clever at changing the world around him to satisfy his immediate needs, but not so clever at looking far ahead, or at thinking about what the future of his action might be.

1．The first paragraph mainly tells us that ________.

[　　]

A．everything in nature can't exist without the help of human beings

B．no living thing can exist naturally

C．all living things in nature depend on each other

D．man has well known the importance of the balance of nature for a long time

2．The examples given in the second paragraph are used to prove that ________.

[　　]

A．it is very important to protect forests

B．there are some living things which can exist all by themselves without change

C．all forms of life belong to a system in which all parts can be changed for one another

D．we cannot change one form of life or matter without disturbing the balance of nature

3．The third paragraph suggests that ________.

[　　]

A．man shouldn't think only about his immediate needs instead of the future results

B．man is very clever at planning his distant future

C．man often feels that he has to give up in despair

D．man is always anxious to control and keep his activities within limits

Answer 1

答案：C;D;A
解析：

1．C　　第一段全段综合理解题。此段重点讲述了“自然界所有生物是相互依存的”。 　　2．D　　综合理解文章第二段，可得出结论：改变一种生物不可能不破坏自然平衡。 　　3．A　　第三段综合理解题。特别是倒数1，2两句间接告诉人们不应只顾眼前而不顾长远利益。