首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
When did the world’s population reach six billion?
When did the world’s population reach six billion?
admin
2009-02-10
29
问题
When did the world’s population reach six billion?
F: Professor Lee, the world’s population passed six billion on Octoberl 1, 1999, we are told. How long did it take to get there and how long will it take to reach seven billion? And ten billion?
M: The world’s population was 300 million at the dawn the Christian era, what we now call the year 1AD. In AD 1500, the world’ s population reached 500 million. It took 304 years until 1804 to reach one billion, another 123 years until 1927, to reach two billion and then only another 33years until 1960, to add another billion to reach three billion.
F: It’s very impressive that the recurring milestones of another billion added to the world’ s population occurred quite quickly.
M: Indeed. The world population reached four billion in 14 years in 1974; five billion in 13years in 1987, and six billion in 12years in 1999. Data suggests that a world population of seven, eight, and nine billion will take respectively another 11,12 and 14years to achieved. The world’ s population should hit ten billion mid-way through the 21 century in the year 2054.
选项
A、2010.
B、2002.
C、2036.
D、2054.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/SQ6K777K
0
专业英语四级
相关试题推荐
HarryPotter:TheEndIsHereWhatalotofcommotionoverabook.Notsince19th-centuryNewYorkersanxiouslycrowdedtheM
HarryPotter:TheEndIsHereWhatalotofcommotionoverabook.Notsince19th-centuryNewYorkersanxiouslycrowdedtheM
TheMessagesinDistanceI.Peoplefromdifferentcultures【T1】______differently【T1】______A.NorthAmericansstandabouttwof
A、Peoplewhoaretrainingtobeteachers.B、Socialworkers.C、PeoplewhoalreadyhaveaBachelor-leveldegree.D、Overseasstuden
Then,whydoAmericanswanttoworkharder?OnereasonmaybethattherealearningsofmanyAmericanshavebeenstagnantorfa
Onemajorobstacletoeconomicdevelopmentispopulationgrowth.Thepopulationsofmostdevelopingcountriesgrewataratemuc
Unlikeanyothercreatureonthisplanet,humanscanlearnandunderstand,withouthavingexperienced.Theycanthinkthemselve
(1)Thepolicemanonthebeatmoveduptheavenueimpressively.Theimpressivenesswashabitualandnotforshow,forspectators
A、Puttinghisideasacrosstoothers.B、Solvingthornyproblems.C、Explainingsolutionstoothers.D、Planningaheadofcolleague
PassageFourWhateffectdoestheironfrombloodcellshaveaccordingtotheresearcher’sexperiment?
随机试题
电突触信息传递的特点不包括
治疗心源性哮喘可选用:
控制热射病高热首选药物是
A、EBVB、HTLVC、HBVD、VZVE、HPV可引起潜伏感染的病毒是
A、2个B、3个C、4个D、5个除处方药外,复方地芬诺酯片一次销售不得超过的最小包装量是
房地产经纪人通过直接接触开拓房源的优点主要有()。
零件进入()阶段时,必须进行修复或更换。
摇臂钻床与立式钻床相比,主要优点有()。
组织结构图绘制方法中,使用最多的是________。
AcenturyagointheUnitedStates,whenanindividualbroughtsuitagainstacompany,publicopiniontendedtoprotectthatcom
最新回复
(
0
)