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发表于 2009-8-19 20:08:17
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本帖最后由 fengrui129 于 2009-8-19 20:15 编辑
做了篇阅读真题, 自我感觉良好,貌似题目很简单
结果居然错了三道··· 5555555 ~~~~(>_<)~~~~
分析分析··
Paragraph 5: There is little doubt, however, that desertification in most areas results
primarily from human activities rather than natural processes. The semiarid lands bordering
the deserts exist in a delicate ecological balance and are limited in their potential to adjust to increased environmental pressures. Expanding populations are subjecting the land to
increasing pressures to provide them with food and fuel. In wet periods, the land may be able to respon d to these stresses. During the dry periods that are common phenomena along the desert margins, though, the pressure on the land is often far in excess of its diminished capacity, and desertification results.
4. According to paragraph 5, in dry periods, border areas have difficulty
○ Adjusting to stresses created by settlement
○ Retaining their fertility after desertification
○ Providing water for irrigating crops
○ Attracting populations in search of food and fuel
4. ○ 1
T his is a Factual Information question asking for specific information that can be found
in paragraph 5. The correct answer is choice 1: border areas have difficulty "adjusting to
stresses created by settlement." The paragraph says that "expanding populations," or
settlement, subject border areas to "pressures," or stress, that the land may not "be able
to respond to." Choice 2 is incorrect because the paragraph does not discuss "fertility "
after desertification. Choice 3 is also incorrect because "irrigation" is not mentioned here.
The paragraph mentions "increasing populations" but not the difficulty of "attracting
populations," so choice 4 is incorrect.
Paragraph 6: Four specific activities have been identified as major contributors to the
desertification processes: overcultivation, overgrazing, firewood gathering, and overirrigation.The cultivation of crops has expanded into progressively drier regions as population densities have grown. These regions are especially likely to have periods of severe dryness, so that crop failures are common. Since the raising of most crops necessitates the prior removal of the
natural vegetation, crop fail ures leave extensive tracts of land devoid of a plant cover and
susceptible to wind and water erosion.
6. According to paragraph 6, which of the following is often associated with raising crops?
○ Lack of proper irrigation techniques
○ Failure to plant crops suited to the particular area
○ Removal of the original vegetation
○ Excessive use of dried animal waste
6. ○ 3
This is a Factual Information question asking for specific information that can be found
in paragraph 6. The correct answer is choice 3, "removal of the original vegetation."
Sentence 4 of this paragraph says that "the raising of most crops necessitates the prior
removal of the natural vegetation," an explicit statement of answer choice 3. Choice 1,
lack of proper irrigation techniques, is incorrect because the paragraph mentions only
"overirrigation" as a cause of desertification. No irrigation "techniques" are discussed.
Choices 2 and 4, failure to p l ant suitable crops and use of animal w aste, are not discussed.
land and the tremendous numbers of people affected, as well as from the great difficulty of
reversing or even slowing the process. Once the soil has been removed by erosion, only the passage of centuries or millennia will enable new soil to form. In areas where considerable soil still remains, though, a rigorously enforced program of land protection and cover-crop
planting may make i t possible to reverse the present deterioration of the surface.
T his is an Inference question asking for an inference that can be supported by the passage .
11. It can be inferred from the passage that the author most likely believes which of the
following about the future of desertification?
○ Governments will act quickly to control further desertification.
○ The factors influencing desertification occur in cycles and will change in the future.
○ Desertification will continue to increase.
○ Desertification will soon occur in all areas of the world.
The correct answer is choice 3; the passage suggests that the author believes
"Desertification will continue to increase." The last paragraph of the passage says that
slowing or reversing the erosion process will be very difficult, but that it may occur in
those areas that are not too affected already if rigorously enforced anti-eros i on processes
are implemented. Taken t ogether, this suggests that the author is not confident this u.il1
happen; therefore. it can be inferred that he thinks erosion w ill continue. The passage
pro v ides no basis for inferring choices 1, 2, or 4. |
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