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
81
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 Behind the UN’s certainty may lay outdated and unreliable census data.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/3086748.html
相关试题推荐
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
Londonhasbecomeacyclefriendlyzoneafterthelaunchofanewbikehire
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
OnOctober31,anewbornbabysomewhereintheworldwillbecomethe7billi
随机试题
Veryfewpeopleunderstoodhislecture,thesubjectofwhichwasvery______.A、o
Whilemanynationshaveagingpopulations,Japan’sdemographiccrisisistr
PeterFernwasmadonmountains.Climbingwastheloveofhislife.Churcht
甲、乙两人相距330千米,他们驾车同时出发,经过2小时相遇,甲继续行驶2小时24
消费金融公司根据客户的(),通过贷款利率风险定价和浮动计息规则,合理确定消费贷款
关于《自由引导人民》这幅名画,下列说法正确的是()。A、是达·芬奇的名作 B
目前我国的基金只有少部分是公司型基金,大部分都是契约型基金。()
长期保存或永久保存的重要文件,书写不能使用()。 A.蓝黑墨水B.碳素墨水
下列各项中可以采用品种法计算产品成本的是()。A.流水线的企业,且该企业不
(2017年真题)某工程施工至2016年12月底,已完工程计划费用2000万元,
最新回复
(
0
)