首页
登录
职称英语
We can begin our discussion of "population as global issue" with what most p
We can begin our discussion of "population as global issue" with what most p
游客
2025-01-14
31
管理
问题
We can begin our discussion of "population as global issue" with what most persons mean when they discuss "the population problem": too many people on earth and a too rapid increase in the number added each year. The facts are not in dispute, it was quite right to employ the analogy that likened demographic growth to "a long, thin powder fuse that burns steadily and haltingly until it finally reaches the charge and explodes. "
To understand the current situation, which is characterized by rapid increases in population, it is necessary to understand the history of population trends. Rapid growth is a comparatively recent phenomenon. Looking back at the 8,000 years of demographic history, we find that populations have been virtually stable or growing very slightly for most of human history. For most Of our ancestors, life was hard, often nasty, and very short. There was high fertility in most places, but this was usually balanced by high mortality. For most of human history, it was seldom the case that one in ten persons would live past forty, while infancy and childhood were especially risky periods. Often, societies were in clear danger of extinction because death rates could exceed their birthrates. Thus, the population problem throughout most of history was how to prevent extinction of the human race.
This pattern is important to notice. Not only does it put the current problems of demographic growth into a historical perspective, but it suggests that the cause of rapid increase in population in recent years is not a sudden enthusiasm for more children, but an improvement in the conditions that traditionally have caused high mortality.
Demographic history can be divided into two major periods, a time of long, slow growth which extended from about 8,000 B. C. till approximately A. D. 1650. In the first period of some 9,600 years, the population increased from some 8 million to 500 million in 1650. Between 1650 and the present, the population has increased from 500 million to more than 4 billion. And it is estimated that by the year 2000 there will be 6.2 billion people throughout the world. One way to appreciate this dramatic difference in such abstract numbers is to reduce the time frame to something that is more manageable. Between 8,000 ]3. C and 1650, an average of only 50,000 persons was being added annually to the world’s population each year. At present, this number is added every six hours. The increase is about 80,000,000 persons annually. [br] Which of the following demographic growth pattern is most suitable for the long thin powder fuse analogy? ______
选项
A、A virtually stable or slightly decreasing period and then a sudden explosion of population.
B、A slow growth for a long time and then a period of rapid, dramatic increase.
C、Too many people on earth and a few rapid increase in the number added each year.
D、A long period when death rates exceeds birthrates and then a short period with higher fertility and lower mortality.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912704.html
相关试题推荐
Whatisthemaintopicofthepassage?[br][originaltext]Rapidpopulation
Whatisthemaintopicofthepassage?[br][originaltext]Rapidpopulation
Whatisthemaintopicofthepassage?[br][originaltext]Rapidpopulation
Whatisthemaintopicofthepassage?[originaltext]Rapidpopulationgrowth
Theworldpopulationwasnomorethan5.7billionbeforetheProgrammewasenfor
Theworldpopulationwasnomorethan5.7billionbeforetheProgrammewasenfor
Theworldpopulationwasnomorethan5.7billionbeforetheProgrammewasenfor
Passage1[br][originaltext]Withtheeconomicglobalization,moreandmore
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
随机试题
[originaltext]Itmightbestrangetoyou,butyouareawfullyfamiliar.(A)Yes
Isawtwofilmsyesterday,butneitherofthem(be)________good.was“neitherof+
机房内有两台同型号的噪声源,室内总噪声级为90dB,单台噪声源的声级应为多少?(
电动卷扬机的种类按起重量分有0.5t、1t、2t、3t、4t、5t、10t、20
为维护公开、公平、公正的市场环境,对中标候选人的公示,下列做法中正确的有()。
依据《汽车号牌视频自动识别系统》(JT/T604-2011)的要求,以下类于汽车
患者,男性,70岁。排尿困难10年,近1年加重,伴尿频、尿急和尿痛。查体:前列腺
4、对于中性点接地的110kV高压设备现场的通道上,其行车安全限高标志至无遮栏带
患者发热,微恶风,咽痛,流黄浊涕,舌边尖红,脉浮数,治疗可选( )。A.银翘散
下列选项中,不属于项目团队组织计划内容的是()。A.组织关系图 B.人员配备计
最新回复
(
0
)