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
71
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 Behind the UN’s certainty may lay outdated and unreliable census data.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/3086747.html
相关试题推荐
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
随机试题
Completethesentencesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.Mo
EachdayofEarthWeek,forexample,hasbeengivenovertoaseparateenvi
【T1】剪纸,顾名思义,就是用剪刀把纸剪成图形(graphics)。(imply)制作典型的剪纸工具极为简单,只需要一把普通的剪刀或小刀,和一张纸。作为一
治疗强心苷中毒引起的重症快速型心律失常的药物是()A.阿托品 B.戊巴比
证券公司、证券投资咨询机构应当按照( )的原则,与客户协商并书面约定收取证券投
趋势线的确认条件包括( )。 Ⅰ.必须确实有趋势存在 Ⅱ.标准趋势线必须由
利率衍生工具不包含()。A.远期利率合约 B.利率期权 C.信用联结票据
伛偻对于()相当于()对于国
(2015年真题)对自动喷水灭火系统实施检查维护,下列项目中,属于年度检查内容
献血者为A型血,经交叉配血试验,主侧不凝集而次侧凝集,受血者的血型应为A:B型
最新回复
(
0
)