题目内容
（请给出正确答案）
A.still
B.already
C.too
D.yet
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更多“【C10】A．stillB．alreadyC．tooD．yet”相关的问题
A．transition
B．transformation
C．transmission
D．transaction
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 unconsciously has an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. 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. That was the first great step in a new association between plants and animals. Grains were discovered and from them flowed the marvel of agriculture: cultivated crops.
(30)
A．Botany is a very ancient learning.
B．People in the Stone Age knew a lot about plants.
C．People in the Stone Age knew little about plants.
D．Pre-industrial societies have little insights about plants.
A．the latter is jealous of the former's happiness
B．the latter has to do some of the former's work
C．the former may force the latter to help with the wedding
D．the latter tends to make mistakes under the former's influence
A．state
B．incident
C．outbreak
D．event
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