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The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward
The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward
admin
2011-01-17
28
问题
The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infinity and doom. On the contrary, demographic history offers evidence that population growth has not been at all constant. According to paleo-ecologist Edward Deevey, the past million years show three momentous changes. The first, a rapid increase in population around one million B. C. , followed the innovations of tool-making and tool-using. But when the new power from the use of tools had been exploited, the rate of world population growth fell and became almost stable.
The next rapid jump in population started perhaps 10,000 years ago, when men began to keep herds, plow and plant the earth. Once again when initial productivity gains had been absorbed, the rate of population growth abated.
These two episodes suggest that the third great change, the present rapid growth, which began in the West between 250 and 350 years ago, may also slow down when, or if technology begins to yield fewer innovations. Of course, the current knowledge revolution may continue without foreseeable end. Either way contrary to popular belief in constant geometric growth-- population can be expected in the long run to adjust to productivity.
What is found to have close relationship with rapid increase in population?
选项
A、War between 2 countries.
B、Ways discovered to increase productivity.
C、Migration from a continent to another continent.
D、A new religion beginning to be accepted by people.
答案
B
解析
答案必须在通读全文之后通过对各细节的概括才能得知:每一次都与生产力和生产方式的提高有关。即第1次在第1段倒数第2句;第2次在第2段第1句;第3次在第 3段第1句。
转载请注明原文地址:https://jikaoti.com/ti/G7pjFFFM
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