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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
2016-02-21
34
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 can be concluded when the current tide of knowledge revolution ebbs?
选项
A、Productivity will rise.
B、Productivity will receive no impact.
C、Population growth will slow down.
D、Population growth will become accelerated.
答案
C
解析
从文中所提到的3次人口的重大变化中可知,每次增长后又开始趋于稳定。由此可推论出:在当前人类处于知识爆炸的时代,科学技术在不断地发展,但如果这一下降趋势持续的话,那么人口也会慢慢降下来。
转载请注明原文地址:https://kaotiyun.com/show/XBai777K
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