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
20
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 Behind the UN’s certainty may lay outdated and unreliable census data.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] Hania Zlotnik agrees that an interval of several months or even a year would be a reasonable______.
选项
答案
range of uncertainty
解析
由题干中的Hania Zlotnik定位到第二段最后一句.由该句可知Hania认为有几个月甚至一年的差距是在一个合理范围内的不确定性。
转载请注明原文地址:https://tihaiku.com/zcyy/3702323.html
相关试题推荐
SpaceenthusiastshopingtobecomeChinasnextastronautsmustpass"super
SpaceenthusiastshopingtobecomeChinasnextastronautsmustpass"super
SpaceenthusiastshopingtobecomeChinasnextastronautsmustpass"super
OnOctober2nd,AshokaMukpolefthisfatheravoicemailfromMonrovia,say
OnOctober2nd,AshokaMukpolefthisfatheravoicemailfromMonrovia,say
Onceapictureisprovedtobeaforgery,itbecomesquite______.A、inexpensiveB
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
LastOctober,ToddBrillwastalkingtohismotherinthediningroomofthei
随机试题
[img]2018m9s/ct_etoefz_etoeflistz_201808_0027[/img][br]WhatdidtheGrants’fi
我国目前对7-9度地震区设置了规范标准,给排水设防应在()度范围内。A.6~
下述药物对闭塞性细支气管炎伴机化性肺炎疗效肯定的是A.先锋霉素 B.博来霉素
异羟肟酸铁反应作用的基团是A.内酯环 B.芳环 C.酚羟基 D.酚
李明的所有网友都不是软件工程师;通过李明而认识大楚公司董事的都是软件工程师;李
根据《外资银行管理条例》,下列属于外资银行营业性机构的有( )。A.外商独资银行
患者,女,39岁,诉左上颌后牙残冠要求拔除。口腔检查:左上第一磨牙牙冠大面积龋损
监管部门接到公民对食品安全咨询、投诉、举报,对不属于本部门职责的,不须受理:(
下列符合铁路混凝土轨枕垛码规定的是()。A.垛码混凝土轨枕应上下交错堆放 B.
拆移式模板的标准尺寸有()。A.100cm×(325~525)cm B.
最新回复
(
0
)