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  3. Botany, the study of plants, occupies a peculiar position is the history of human knowledge. For many thousands of years it was

Botany, the study of plants, occupies a peculiar position is the history of human knowledge. For many thousands of years it was

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问题    Botany, the study of plants, occupies a peculiar position is the history of human knowledge. For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insight. It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of preindustrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been enormously important to the welfare of peoples, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelters, and a great many other purposes. Tribes living today in the jungles of the Amazon recognized literally hundreds of plants and knew many properties of each. To them, botany, as such, has no name and is probably not even recognized as a special branch of knowledge at all.
   Unfortunately, the more industrialized we become the farther away we move from direct contact with plants, and the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. When our Neolithic ancestors, living in the Middle East a- bout 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer yields the next season, the first great step in a new association of plants and humans was taken. Grains were discovered and from then flowed the marvel of agriculture, cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild and the accumulated knowledge of tens of thousands of years of experience and intimacy with plants in the wild would begin to fade away.
According to the passage, why has general knowledge of botany begun to fade?
选项 A、People no longer value plants as a useful resource.
B、Botany is not recognized as a special branch of science.
C、Research is unable to keep up with increasing numbers of plants.
D、Direct contact with a variety of plants has decreased.
答案D
解析 原因推断题。根据第二段第一句Unfortunately…grows．原文的the less distinct与本题用的 fade 意义相同，均为“生疏”之意。A项与原文相反。B项内容仅涉及亚马逊丛林的部落。本文未涉及C项内容。
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