首页
登录
职称英语
The growth of population during the past few centuries is no proof that popu
The growth of population during the past few centuries is no proof that popu
游客
2023-07-25
57
管理
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. And when one takes this view, population growth is seen to represent economic progress and human triumph rather than social failure. [br] How many significant demographic changes ever occurred in the past one million years?
选项
A、One.
B、Two.
C、Three.
D、None.
答案
C
解析
从文章第一段我们知道在过去一百万年中人口经历了三次重大变化,所以这一题答案很容易找到。
转载请注明原文地址:https://tihaiku.com/zcyy/2868230.html
相关试题推荐
Theadvantagesanddisadvantagesofalargepopulationhavelongbeenasubj
Theadvantagesanddisadvantagesofalargepopulationhavelongbeenasubj
Aclassicseriesofexperimentstodeterminetheeffectsofoverpopulationo
Aclassicseriesofexperimentstodeterminetheeffectsofoverpopulationo
Aclassicseriesofexperimentstodeterminetheeffectsofoverpopulationo
Allmyefforts____________(集中在理解他们的英语上)duringthosetwohoursofthedaywhenI
[originaltext]M:IhopetogetajobduringChristmastoearnsomemoney.Howa
[originaltext]M:IhopetogetajobduringChristmastoearnsomemoney.Howa
[originaltext]M:IhopetogetajobduringChristmastoearnsomemoney.Howa
[originaltext]M:IhopetogetajobduringChristmastoearnsomemoney.Howa
随机试题
Therewasagood______ofthecountrysidefromthefrontofthebus.A、sightB、vie
Manymenandwomenhavelongboughtintotheideathatthereare"male"and
Blindpeopleusuallypossessoneadvantageoverotherpeoplewhocansee:t
ShareholdersarewarningLloydsBankingGroupthattheyhaveresidualconcer
关于选题报告,说法错误的是( )。A.选题报告是选题设想通过论证后所撰写的书面
1929年南京国民政府公布《大学组织法》和《大学规程规定大学的办学目标是()A.
患者女,71岁,高血压20余年,阵发性胸痛2个月,加重2天。2天前无明显诱因出现
建筑工程一切险和安装工程一切险规定保险公司承担保险责任的范围包括( )的损失。A
难以鉴别的肾癌和肾囊肿,最可靠的检查方法是 A.排泄性尿路造影 B.
下列工程质量问题中,一般可不做专门处理的情况有()。A.混凝土结构裂缝 B.
最新回复
(
0
)