2. 外语
  3. The industrial societies have been extremely productive during the last two centuries. The economic advance has been 【C1】______

The industrial societies have been extremely productive during the last two centuries. The economic advance has been 【C1】______

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问题     The industrial societies have been extremely productive during the last two centuries. The economic advance has been 【C1】______ . During this 【C2】______ short period of time, greater changes in people’s 【C3】______ have occurred than in the thousands of years 【C4】______ preceded. From about 8000 B. C., when the agricultural 【C5】______ of the human race began, 【C6】______ 1776 A. D., the beginning of the American Revolution, people grew hardly any richer 【C7】______ . The Americans of 1776 used the same energy 【C8】______ as the Romans of 1 A. D.. Both the ancient Romans and Americans of 200 years ago could travel about the same short distance in a day. Both had about the same annual income and the same life 【C9】______ . During the past 200 years the world population has increased 6 times, the annual world 【C10】______ has increased 80 times, and the distance a person can travel has 【C11】______ 1,000 times. There 【C12】______ also been much recent progress on art, culture, learning, and science. Such changes have led to a high 【C13】______ of production and 【C14】______ of the economy. Economists fear that within the next 100 to 150 years, the earth’s 【C15】______ will become very 【C16】______ . Their fears are partly 【C17】______ , but we should not be afraid. Industrial civilization 【C18】______ new knowledge. By advancing knowledge, we not only 【C19】______ new forms of resources, but we also find ways to economize their use. Advanced modern knowledge can feed the hungry people of the world and improve their 【C20】______ of living.
【C13】
选项 A、ratio
B、proportion
C、rate
D、percentage
答案C
解析
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大学英语四级

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