首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
We can begin our discussion of "population as global issue" with what most persons mean when they discuss "the population proble
We can begin our discussion of "population as global issue" with what most persons mean when they discuss "the population proble
admin
2009-08-19
21
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.
选项
A、statistics of human
B、surroundings study
C、accumulation of human
D、development of human
答案
A
解析
语义题。由文章第一段中的the population problem及rapid increase in the number可知,demographic的含义应该与“人口”和“数量”有关,而-graphic表示“写、画、记录的”,由此推断A(人口统计)正确。B (环境研究),C(人口的积聚),D(人类的发展),均与文意不符,故排除。
转载请注明原文地址:https://jikaoti.com/ti/aR0MFFFM
0
大学英语六级
相关试题推荐
Todayourknowledgeoffoodandwhatitdoesforourbodiesisfarmoreadvancedthanthatoftheoldtimes.Nowweknowaboutv
Todayourknowledgeoffoodandwhatitdoesforourbodiesisfarmoreadvancedthanthatoftheoldtimes.Nowweknowaboutv
Researcherssaypeopletravelingintrafficarethreetimesmorelikelytosufferaheartattack.Theysaytheriskofahearta
Duringtheholidays,theconcertenjoyshuge(popular)______despitethehighticketprice.
Hemighthavebeentakenintoprisonnowifhe(join)______thekidnappers.
Ifyouarenow______,youneedtodomoreexercisestobuildyourbody.
A、ShecancheckMr.Smith’stimetableherself.B、She’llchecksomethingfortheman.C、Shehasputupasignonthedoor.D、She
Weallhavebeen(deep)______impressedbyFran’sunderstandingoftheInternetofThings.
Howdopeopleoftenmeasureprogressinagriculture?Whatistheauthor’spurposeinwritingthispassage?
Whatisthepassagemainlyabout?AccordingtotheUSNationalCenterforHealthStatistics,theincreasedobesityintheUSis
随机试题
A.草酸钙结石B.尿酸结石C.胱氨酸结石D.黄嘌呤结石E.磷酸钙和磷酸镁氨结石
女性,32岁,阵发性上腹痛2年,夜间加重,疼痛有季节性,冬季明显,有反酸,为进一步确诊,首选的检查方法是
焊接工艺评定应以可靠的()为依据,并在工程施焊之前完成。
评估人员在评估企业股东部分权益价值时,在适当及切实可行的情况下应当考虑()。
注册税务师审核时,对以下业务可以不按工资薪金计算个人所得税的有( )。
你最不喜欢的工作是什么?为什么?
地质遗迹资源是指在地球演化的漫长的地质历史时期中,由于内外动力的地质作用而形成,发展并保存下来的珍贵的,不可再生的,并能在现在和可预见的将来,可供人类开发利用并产生经济价值。以提高人类当前和将来福利的自然遗产。根据上述定义,下列属于地质遗迹资源的是(
以下______方式不是口令系统最严重的弱点。
Weallhave【C1】________dayswheneverything【C2】________wrong.Adaymaybeginwellenough,butsuddenlyeverythingseemstoge
Haveyoueverheardthesaying"AllworkandnoplaymakesJackadullboy"(只工作,不玩耍,聪明孩子也变傻).Howdoyouinterpretitandhowa
最新回复
(
0
)