首页
登录
职称英语
On October 31, a newborn baby somewhere in the world will become the 7 billi
On October 31, a newborn baby somewhere in the world will become the 7 billi
游客
2023-10-10
80
管理
问题
On October 31, a newborn baby somewhere in the world will become the 7 billionth member of the human race. Or so says the UN—alternatively, this date could be at least a year too early. Behind the UN’s certainty may lay outdated and unreliable census data. The suspicion is that millions of births and deaths have not been counted and there is huge uncertainty about the rate at which women are giving birth. The precise "day of 7 billion" may not matter much. But the inaccuracies(不精确)make it harder to answer a more important question: is human population set to peak within the next few decades or will it carry on growing beyond that?
Wolfgang Lutz of the Vienna Institute of Demography says the UN is "under political pressure to disregard(忽视)uncertainty and name a date" for 7 billion. But he and colleague Sergei Scherbov estimate that the world probably won’t reach 7 billion until early in 2013, though it could be as late as 2020. The director of the UN population division Hania Zlotnik defends her data but agrees that "an interval of a few months or even a year would be a reasonable range of uncertainty".
One problem for demographers(人口统计学家)is undercounting. Even developed countries calculate their censuses miss up to 3 percent of people. Up-to-date figures have to adjust for both of this and the changes since the last census, which could be decades in the case of some African countries. So adjusting for extra people is routine. The big danger, Scherbov says, may be over-adjusting. The world has seen a dramatic decline in fertility in recent years, with the average woman now having only 2. 5 children, half as many as her grandmother 50 years ago. So there may be far fewer new arrivals than demographers assume.
Questions: [br] According to Scherbov, what is the result of over-adjusting the big danger?
选项
答案
A dramatic decline in fertility.
解析
由题干中的Scherbov,big danger定位到第三段第五句.第四、五句的句意为,对多余的人口数目进行调整是惯例,但是Scherbov表示大的危险或许被矫枉过正了.第六句接着指出,近年来世界人口繁殖呈现戏剧化的衰落。由此可以判断大的危险被矫枉过正的结果就是人口繁殖的戏剧化衰落。
转载请注明原文地址:https://tihaiku.com/zcyy/3087707.html
相关试题推荐
Writeaboutthefollowingtopic:Inrecentyears,travelhasbecomeacommontop
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
______inthecompanyforthreeyears,Markhasbecomeexperiencedinbusinessn
Gettinganonlinedegreethroughdistancelearninghasbecomepossiblebecau
Gettinganonlinedegreethroughdistancelearninghasbecomepossiblebecau
Gettinganonlinedegreethroughdistancelearninghasbecomepossiblebecau
[originaltext]M:What’sthematterwithMary?W:Shebecomesnervouswheneveri
空气污染在城市和农村都已成为越来越严峻的问题。Airpollutionhasbecomeamoreandmoreseriousproblem
In18th-centurycolonial(殖民地的)America,thosewhowantedtobecomedoctors
随机试题
ReadingInthisquestion,youwillreadashortpassageonanacademics
Today,theworldwidewebcanbeusedbothtosearchinformationandtomake
Tworecentstudieshaveconfirmedthebeliefthatsizedoesmatter,atleast
下列几条节能措施中,哪一条不正确?()A.用导热系数小的材料作外墙 B.用
关于地震烈度的说法,正确的是()。A:地震烈度是按一次地震所释放的能量大小来划
在Windows的网络属性配置中,“默认网关”应该设置为下列哪项的地址?A.DN
商业设计也许越来越被赋予艺术创作和欣赏的价值,但它根本的出发点和落脚点永远是把产
A.雄黄 B.白矾 C.轻粉 D.蛇床子 E.土荆皮外用杀虫止痒,内服利
下述药物中使用后应避免从事高空作业、驾驶汽车等有危险性的机械操作的是()A
根据安全生产教育培训制度,管理人员的安全教育对象包括()。A.特种作业人员 B
最新回复
(
0
)