[问答] 求助一道阅读题 [复制链接]

超龄过气美少女
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电梯直达

楼主

发表于 2017-7-27 15:58:42 |只看该作者 |倒序浏览

考满分阅读机经的101篇的第三题
我看了考满分老师去年的网课，上面有讲这道题
老师讲解的答案是d
我查到的机经上的答案都是e

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超龄过气美少女
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沙发

发表于 2017-7-27 16:00:19 |只看该作者

有人知道具体答案应该是什么吗
Passage 101
This passage is adapted from material published in 1993
The recent recognition of a link between increasing rates of deforestation and increasing global climatic warming has focused new attention on the ecological role of forests. Deforestation threatens the continued existence of forests, and their loss would lead to an immediate, irreversible destabilization of the climate because the destruction of forests contributes to increased atmospheric concentrations of such heat-trapping gases as carbon dioxide and therefore to the acceleration of global warming.
The world is at present accumulating carbon dioxide in the atmosphere from two well-known sources the combustion of fossil fuels and deforestation. Deforestation results in higher levels of carbon dioxide in the atmosphere because the carbon stored in plants and trees is released when trees decay or are burned. A third sources, the warming-enhanced decay of organic matter in forests and soils, especially in the middle and higher latitudes, is now being recognized as potentially significant. Evidence is accumulating that carbon from this source is beginning to have global effects. Thus, two of the three sources of carbon dioxide in the atmosphere are directly related to the survival and health of forests.
In the discussion about the importance of forests, however, emphasize has fallen on biodiversity, or numbers of species per unit area, especially in the tropics, where such diversity is particularly high. But forests, it should be emphasized, have a similar role in every latitude they contain the largest numbers of different kinds of plants and animals of any community on land and might be considered the most highly developed of the terrestrial communities from the standpoint of complexity of structure and diversity of life and life forms. Forests are far more than simple collections of species, however, it is unfortunate that the discussion of biotic or living resources has been focused on biodiversity rather than on the actual ability of the land itself to support life. In order for the complete range of plant and animal life to thrive, the soil must contain essential nutrients in their proper quantities and proportions, and the atmosphere must be composed of the correct molecules in their proper proportions. If the soils were to become infertile and the atmosphere inhospitable, more than mere diversity or numbers of species would be lost, the land would become impoverished and no longer be able to support any life.
Deforestation almost invariably speeds up the loss of nutrients into watercourses. It also, as previously explained, involves a release of carbon into the atmosphere. Forests thus play a clear and critical role in helping to protect the capacity of the land to support life by increasing the retention of nutrients and in helping to stabilize the atmosphere by storing carbon.
1. The passage is primarily concerned with discussing the
A. importance of forests for protection the land and atmosphere B. role of forests in the tropics versus that in the higher latitudes. C. process of deforestation in the tropics
D. need for forests to ensure the preservation of biodiversity
E. negative effects of recent global climatic changes in forests.
2. According to the passage, the emphasis on preserving biodiversity in forests has had which of the following effects?
A. diverted attention from the importance of the land’s ability to support life.
B. led to recognition of the causes complexity of terrestrial communities.
C. led to an understanding of the causes of accelerated rates of global warming.
D. resulted in the formulation of the concept of biotic resources.
E. shifted attention away from the role of forests in stopping the accumulation of carbon dioxide in the atmosphere.
3. The passage suggests that the emphasis on a forests biodiversity has had which of the following unfortunate consequences?
A. It has fostered the view that forests have a similar role in every climate.
B. It has fostered the view that deforestation almost invariably speeds erosion
C. It has fostered resistance to preserving any forests but tropical ones.
D. It has led to an increase in the rate at which the land is becoming impoverished E. It has led to an underestimation of the importance of some forests
4. The primary purpose of the third paragraph of the passage is to
A. explain how the land supports life
B. explain what happens when soil becomes infertile
C. explain why a certain development in the discussion of forests is regrettable D. show that forests are far more than simple collections species
E. argue that forests with a small number of species are more important to the support of than forests with many species

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yume1491
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板凳

发表于 2017-8-20 16:54:01 |只看该作者

For 3, E is correct. D is wrong because it is not mentioned in the passage. The phrase "forests biodiversity" implies that there are differences between some forests.

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