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] The word "demographic" in the first paragraph means ______.
选项
A、statistics of human
B、surroundings study
C、accumulation of human
D、development of human
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912708.html
相关试题推荐
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
Largepartsoftheworldhavenotenjoyedtheremarkableglobalprogressin
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
随机试题
SuggestopediaI.IntroductionA.Basedonhowtheb
[originaltext]M:I’mthinkingaboutwhethertotellthatstoryaboutJoeatthe
A.空挡滑行通过 B.保持高速通过 C.适当加速通过 D.低速缓慢通过
某算术表达式用二叉树表示如下,该算术表达式的中缀式为(),其后缀式为(请作答此
在测量眼球时,组成后壁的复合回声构成是A.视网膜、角膜和巩膜 B.视网膜、脉络
登革热的并发症中最常见的是:A.心肌炎 B.尿毒症 C.肝肾综合征 D.急
消化道穿孔最有意义的诊断依据是A.腹部按诊 B.腹部B超不均质回声团 C.腹
分析师在进行上市公司财务报表分析的时候,不需要考虑的因素是( )。A.公司会计
给予(透析患者)非甾体类抗炎药的依据是A.有助于机体合成红细胞 B.腹膜透析容
根据《建设项目安全设施“三同时”监督管理暂行办法》,建设项目安全设施是指(
最新回复
(
0
)