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
2024-08-02
19
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 Behind the UN’s certainty may lay outdated and unreliable census data.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] The censuses miss of developed countries would be up to______.
选项
答案
3 percent of people
解析
由题干中的censuses miss和developedcountries定位到第三段第二句。由定位句可知,即使是发达国家的人口普查数据的误差也高达3%。
转载请注明原文地址:https://tihaiku.com/zcyy/3702324.html
相关试题推荐
Writeaboutthefollowingtopic:Inrecentyears,travelhasbecomeacommontop
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
_____isfamilyviolencemoreofaproblemthaninthiscity.A、SomewhereB、Nowhe
______inthecompanyforthreeyears,Markhasbecomeexperiencedinbusinessn
Gettinganonlinedegreethroughdistancelearninghasbecomepossiblebecau
[originaltext]M:What’sthematterwithMary?W:Shebecomesnervouswheneveri
[originaltext]M:What’sthematterwithMary?W:Shebecomesnervouswheneveri
随机试题
Whenwewantto(56)otherpeoplewhatwethink,wecandoitnotonlywith
[img]2015m7x/ct_egreqj_egreqtbz1_0100_20151[/img]Thefigureaboveshowsthepro
However,Idon’tbelievethatthereisaneedtomakeclassattendancemandatory
Studentsmustapplyforaplacebeforeattendinganyclass.Applications(申请)
下列因素中,不是容积效率影响因素的是()。A.气缸中不可避免地保留有一定的余
关于CT窗口技术,错误的是A.改变灰度 B.改变对比度 C.抑制或去除噪声
下列关于资产证券化业务的说法,正确的是( )。A.管理人未取得资产管理业务资格
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
要想达到较高的评价者信度,需要注意的问题包括()。A.测试过程要标准化
赵某因工作较忙无暇打理家务,遂与吴某口头约定,由吴某每周来赵某家两次,每次整理家
最新回复
(
0
)