首页
登录
学历类
In the 20th century the planet's populat
In the 20th century the planet's populat
admin
2022-08-02
38
问题
In the 20th century the planet's population'doubled twice.It will not double even once in the 1 century,because birth rates in much of the world have 2 steeply.But the number of people over 65 is set to 3 within just 25 years.This shift in the structure of the population is not as momentous as the 4 that came before.But it is more than enough to reshape the world economy.5 the UN's population 6,the standard source for demographic estimates,there are around 600m people aged 65 0r older 7 today.That is in itself remarkable;the author Fred Pearce claims it is 8 that half of all the humans who have ever been over 65 are alive today.But 9 a share of the total population,at 8%,it is not that 10 to what it was a few decades ago.By 2035,11,more than l.1 billion people-13%of the population-will be above the age of 65.This is a 12 result of the dropping birth rates that are slowing overall population growth;they mean there are 13 fewer younS people around.The"old-age dependency ratio"-the ratio of old people to those of working age-will 14 even faster.In 2010 the world had 16 people aged 65 and over for every 100 aduILs between the ages of 25 and 64,15 the same raLio it had in 1980.By 2035 the UN 16 that number to have risen to 26.In rich countries it will be much higher.Japan will have 69 0ld people for every 100 0f working age by 2035,Germany 66.17 America,which has a relaLively high 18 rate,will see its old-age dependency rate rise by more than 70%,t0 44.Developing counLries,19 today's ratio is much lower,will not see absolute levels rise that high;20 the proportional growth will be higher.Over the same time period the old-age dependency rate in China will more than double from 15 t0 36.Latin America wiU see a shift from 14 to 27.3选?A.decreaseB.doubleC.increaseD.halve
选项
A.decrease
B.double
C.increase
D.halve
答案
B
解析
动词辨析题。[A]decrease减少;[B]double翻倍;[C]increase增加;[D]halve减半。根据第三空前面的But-词可以推断,该句表述的内容跟上文表述的内容相反,上文提到:本世纪世界人口数量不会翻倍;本句提到:但是老人数量在25年内会3。可以推断出该空的最佳答案为[B].这样才能与上文的will not double形成对比转折。
转载请注明原文地址:https://tihaiku.com/xueli/2700596.html
本试题收录于:
英语二研究生题库研究生入学分类
英语二研究生
研究生入学
相关试题推荐
Withtheglobalpopulationpredictedto
Withtheglobalpopulationpredictedto
Withtheglobalpopulationpredictedto
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
Inthe20thcenturytheplanet'spopulat
随机试题
Computersareelectronicmachinesforprocessingdata.Dataarepiecesorit
SDH传输体制可将PDH三种数字系列及ATM信元映射到VC-4中。
热的传递方式有A.传导、辐射、对流 B.反射、折射、散射 C.辐射、散射、对
下列哪项描述符合小儿良性癫痫伴中央颞区棘波A.多在生后2~3岁起病 B.癫痫发
治疗虹膜睫状体炎的首要措施是A.全身用抗生素 B.散瞳 C.皮质类固醇 D
患者男,48岁。胸痛2小时,查体:血压100/60mmHg,双肺湿罗音,心电图示
(2020年真题)下列对商业银行久期缺口的描述,恰当的是()。A.通常情况下,
女童,5岁,右下第二乳磨牙咬合面深龋洞,腐质去净后洞底在牙本质浅层,治疗方法是A
自动喷水灭火系统的闭式喷头在安装前应进行( ).A.喷洒性能试验 B.强度性
竣工结算一般由( )编制。A.施工单位 B.监理单位 C.设计单位 D.
最新回复
(
0
)