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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 proprieties 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, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know many proprieties 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.1.Which of the following assumptions about early humans is expressed in the passage?2.Why has general knowledge of botany begun to fade?3.What was the first great step toward the practice of agriculture?4.The relationship between botany and agriculture is similar to the relationship between zoology and ( ).5.The beneficial proprieties that plants have for humans include the following fields EXCEPT( ).



A.They probably had extensive knowledge of plants. B.They thought there was no need to cultivate crops. C.They did not enjoy the study of botany. D.They placed great importance on the ownership of property.
问题2:
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 the increasing number of plants. D.Direct contact with a variety of plants had decreased.
问题3:
A.The invention of agricultural implements and machinery. B.The development of a system of name for plants. C.The discovery of grasses that could be harvested and replanted. D.The changing diets of early humans.
问题4:
A.deer hunting B.bird watching C.sheep raising D.horseback riding
问题5:
A.entertainment B.shelter C.clothing D.food

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