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
11
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 author of the passage intends to ______.
选项
A、warn people against the population explosion in the near future
B、compare the demographic growth pattern in the past with that after 1650
C、find out the cause for rapid increase in population in recent years
D、present us a clear and complete picture of the demographic growth
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912707.html
相关试题推荐
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsoft
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
TheWorldTradeOrganization(WTO)is【C1】______dealingwiththeglobalrulesof
随机试题
Didyouknowthatallhumanbeingshavea"comfortzone"regulatingthedist
Asamatteroffact,whenallalanguagetakesfromanotheroneismerewords
[audioFiles]2019m4x/audio_ezfj_201903_012[/audioFiles]H
她的收入连一个孩子都养不起,更别说三个了。(maintain)Hisincomewasbarelyenoughtomaintainonechi
A.抑制肾小球滤过 B.直接抑制肾小管H-Na交换 C.直接抑制肾小管K-N
以下关于附息债券说法正确的是()。 Ⅰ.发行者按票面利率定时向持券人支付利息
慢性左心衰竭最早出现的症状是()A.下肢水肿 B.咳嗽、咳痰 C.端坐
一般饮片在煎煮前应先用冷水浸泡约A.5minB.10minC.30minD.60
某机关20人参加百分制的普法考试,及格线为60分,20人的平均成绩为88分,及格
男孩,1岁。发热伴咳嗽,气促7天,自出生后喂养困难,生长发育落后,多次患肺炎。查
最新回复
(
0
)