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
Populations tend to grow at an exponential (指数的) rate. This means that they progressively double. As an example of this type of
Populations tend to grow at an exponential (指数的) rate. This means that they progressively double. As an example of this type of
admin
2014-04-23
70
问题
Populations tend to grow at an exponential (指数的) rate. This means that they progressively double. As an example of this type of growth rate, take one penny and double it every day for one month. After the first week you would have only 64 cents, but after the fourth week you would have over million dollars.
This helps explain why the population has come on "all of a sudden". It took from the beginning of human life to the year 1830 for the population of the earth to reach one billion. That represents a time span of at least two million years. Then it took from 1830 to 1930 for world population to reach 2 billion. The next billion was added by 1960, only thirty years, and in 1979 world population reached 4 billion, which is another billion people in only fifteen years.
World population is increasing at a rate of 9 000 per hour, 220 000 per day, 80 million per year. This is not only due to high birth rates, but to lower death rates as well. The number of births has not declined at the same rate as the number of deaths.
Some countries, such as Colombia, Thailand, Morocco, Costa Rica, and the Philippines, are doubling their populations about every twenty-one years, with a growth rate of 3. 3 percent a year or more. The United States is doubling its population about every eighty-seven years, with a rate of 0. 8 percent per year. Every time a population doubles, the country involved needs twice as much of everything, including hospitals, schools, resources, food and medicines to care for its people, it is easy to see that this is very difficult to achieve for the more rapidly growing countries.
Which of the following statements is NOT true?
选项
A、World population is increasing at a rate of 150 per minute.
B、Lower death rate also contributes to world population growth.
C、The population of Colombia has been doubling every year for 21 years.
D、The United States is usually doubling its population about every 87 years.
答案
C
解析
本题是一道判断是非类问题。问下面哪个说法是不正确的。针对四个选项,利用查阅式阅读法并结合原文相关内容,我们可以推断出本题的正确答案应是C“哥伦比亚的人口已经每年持续翻番达21年”。这种说法与文章最后一段的第一句话内容不符。这句话指出,在诸如哥伦比亚、泰国、摩洛哥、哥斯达黎加及菲律宾等国家,每隔21年人口便增加一倍,每年的增长率达3.3%或者更高。
转载请注明原文地址:https://kaotiyun.com/show/qoWO777K
0
在职攻硕英语联考
相关试题推荐
ItisamyththatthelawpermitstheFoodandDrugAdministrationtoignorerequirementsfor______drugswhilebrand-namedrugs
ThehistoryofresponsestotheworkoftheartistSandroBotticelli(1444—1510)suggeststhatwidespreadappreciationbycritics
By1830theformerSpanishandPortuguesecolonieshadbecomeindependentnations.Theroughly20million【C1】______ofthesenati
MillionsofpeopleintheUnitedStatessufferfrom______backpainthatcomesfromsittingtoolongatadesk.
Somepeople______inpartthedefeatoftherevolutioninFranceandGermanytotheEnglishdiplomacy,doyouagree?
Thereisonlyonedifferencebetweenanoldmanandayoungone:theyoungonehasagloriousfuturebeforehimandtheoldone
Wemusttryto______thebestofourmoralvaluesforourchildrenandgrandchildren.
Advertiserstendtothinkbigandperhapsthisiswhythey’realwayscominginforcriticism.Theircriticsseemtoresentthem
ThePonyExpressisanoutstandingexampleofcourage,endurance,anddeterminationinthewestwardexpansionoftheUnitedStat
随机试题
肺炎患儿病室适宜的温度、相对湿度为
患者,女,63岁,因头晕入院,测血压为160/100mmHg,医生给其用硝苯地平和普萘洛尔。普萘洛尔的结构母核属于芳氧丙醇胺类,下列药物不具有芳氧丙醇胺结构的是()。
以下哪些情况,应进行混凝土碳化深度检测()。
出让国有建设用地使用权出租的,租期届满而土地使用权未到出让年限时,出租人有权收回土地使用权,土地上承租人投资建造的建筑物、其他附着物归()。
《国土资源听证规定》规定,依当事人的申请组织的听证,一律公开举行。()。
以下几种定价形式属于心理定价的是()。
关于教师对于不同气质学生的指导,正确的是()。
W-12是一种严重危害谷物生长的病毒,每年要造成谷物的大量减产。科学家们发现。把一种从W-12中提取的基因,植入易受感染的谷物基因中,可以使该谷物产生对针对W-12的抗体,从而大大减少损失。以下各项如果为真,都能加强上述结论,除了
A.GettingcarriedawaywiththecultureB.CarryingvastamountofluggageC.StayingontheroadtoolongD.Weari
TheGuildfordFour,freedlastweekafterspending15yearsinprisonforcrimestheydidnotcommit,wouldalmostcertainlyhav
最新回复
(
0
)