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

Botany, the study of plants, occupies a peculiar position in 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 in 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 insights. 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 people, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know 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 about 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 them 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.
What does the comment "This is logical." in line 5 of the first paragraph (underlined) mean?
选项 A、There is no clear way to determine the extent of our ancestor’s knowledge of plants.
B、It is not surprising that early humans had a detailed knowledge of plants.
C、It is reasonable to assume that our ancestors behaved very much like people in preindustrial societies.
D、Human knowledge of plants is well organized and very detailed.
答案B
解析 本题考查细节。在这句评论的前面，作者曾讲到过，早期的人类对植物有着广博的知识，虽然今天我们不可能知道我们的祖先对植物都了解些什么，但可以断定他们掌握了非常详细的植物学知识。“This is logical．(这很合乎逻辑)”，因为“Plants are the basis of the food pyramid for all living things，even for other plants．(植物对所有生物，甚至对于其他植物来说，是食物金字塔的基础。)”所以，他们掌握了非常详细的植物学知识一点也不令人吃惊，即选项B 正确。
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