首页
登录
职称英语
We can begin our discussion of "population as global issue" with what most
We can begin our discussion of "population as global issue" with what most
游客
2023-09-02
44
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 bums 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 8000 B.C. till approximately 1650 A.D. In the first period of some 9,600 years, the population increased from some 8 million to 500 million in 1650. Between 1650 and 1975, the population has increased from 500 million to more than 4 billion. And the population reached 6.2 billion throughout the world by the year 2000. One way to appreciate this dramatic difference in such abstract numbers is to reduce the time frame to something that is more manageable. Between 8000 B.C. and 1650, an average of only 50,000 persons was being added annually to the world’s population. At present, this number is added every six hours. The increase is about 80,000,000 persons annually. [br] During the first period of demographic history, societies Were often in danger of extinction because ______.
选项
A、only one in ten persons could live past 40
B、there was higher mortality than fertility in most places
C、it was too dangerous to have babies due to the poor conditions
D、our ancestors had little enthusiasm for more children
答案
B
解析
细节题。由文章第二段倒数第二句可知,在人口统计学历史上的第一个阶段,社会常有覆灭的危险是因为很多地方人口死亡率比出生率高,所以B正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2980299.html
相关试题推荐
Withtheglobaleconomynowtakingmoreexecutivestofar-awayplaceslikeB
Withtheglobaleconomynowtakingmoreexecutivestofar-awayplaceslikeB
Withtheglobaleconomynowtakingmoreexecutivestofar-awayplaceslikeB
Hollywood"Globalized"WhendirectorAdamMcKaypitc
Hollywood"Globalized"WhendirectorAdamMcKaypitc
Hollywood"Globalized"WhendirectorAdamMcKaypitc
Hollywood"Globalized"WhendirectorAdamMcKaypitc
Hollywood"Globalized"WhendirectorAdamMcKaypitc
Peoplewithdisabilitiescomprisealargepartofthepopulation.Itis【C1】_
Peoplewithdisabilitiescomprisealargepartofthepopulation.Itis【C1】_
随机试题
Whatisthetalkmainlyabout?[br][originaltext]TodayI’dliketotalka
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,
某公司发行八年期一千元面值零息债券,折现率为 4%。问以下哪个答案最接近该债券的
关于精索静脉曲张的治疗,下列哪项是错误的()A.无症状或症状较轻者,可仅用阴
面对部分西非国家相继爆发埃博拉疫情,中国政府先后提供了总价值7.5亿元人民币的援
当社会总供给大于总需求时,政府可实施的财政政策措施有()。 Ⅰ.増加财政补贴
在QDII制度中,基金、集合计划不得购买证券用于控制和影响发行该证券的机构或管理
A.法制司B.综合司C.食品安全监管一司D.药品化妆品注册管理司E.医疗器械监管
A.较稳定,遇湿热不起变化,但可压性和流动性较差的药物 B.较不稳定,遇湿热分
急性心肌梗死护理措施中最重要的是A.清淡、低盐饮食 B.盐水灌肠,促进排便
最新回复
(
0
)