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
A country is said to become more urbanized as its cities grow in number, its urban populations increase in size, and the proport
A country is said to become more urbanized as its cities grow in number, its urban populations increase in size, and the proport
admin
2010-04-30
56
问题
A country is said to become more urbanized as its cities grow in number, its urban populations increase in size, and the proportion of its population living in urban areas rises. The degree of urbanization varies across the world but generally reflects the wealth of individual countries. The rich, industrialized countries tend to be the most highly urbanized. In the Netherlands, for example, 89 percent of the population is urban, compared to only 13 percent in Ethiopia, a much poorer country.
In recent history, the degree of urbanization has been relatively low in Africa and Asia compared to Europe and North America. However, as a result of large-scale migration from rural areas and a natural increase in the urban populations themselves, the populations of cities in the developing world have been growing rapidly. The population of Cairo, for example, has tripled in the last 40 years, and more than half of Africa’s people are expected to be living in cities by 2020. Similarly, the urban share of the population in China has risen from about one in five in 1960 to nearly half today.
One of the most noticeable features of urban growth in the 20th century has been the rapid increase in the number of very large cities. Before 1800, cities with more than a million inhabitants were rare. Since then, however, the number of such cities has risen steadily. In 1900 there were at least 13 cities with more than a million inhabitants, and by 1950 the number had grown to 68. By 2000 there will be at least 250 cities of more than a million--many of which will be in Asia, especially in India and China.
Even a city of a few million people is dwarfed by the urban giants with populations exceeding 10 million. According to various estimates, there may be 20 or more of these gigantic metropolitan areas already. Most are in Asia: Tokyo, Seoul, Osaka, Shanghai, Mumbai (Bombay), Beijing, Calcutta, Jakarta, Tianjin, Karachi, Delhi, and Manila. The other giants are New York, Sao Paulo, Mexico City, Los Angeles, Moscow, Buenos Aires, Rio de Janeiro, and Cairo. In coming years, explosive growth in cities of the developing world such as Lagos and Santa Fe de Bogotá will almost certainly propel them into this group. By the year 2020, several cities are expected to have populations of more than 20 million.
Such large concentrations of people pose immense environmental problems. In Mexico City, for example, one-quarter of the population has no access to running water, and one in five houses is not connected to the sewerage system. Located in a valley, the city suffers so badly from air pollution from motor vehicles that the city center must periodically be closed to traffic. Mexico City’s problems are replicated in most other large cities in the developing world, and to a lesser degree in the large cities of industrialized countries as well.
In Paragraph 3, the author mainly employs______to illustrate his point.
选项
A、examples
B、figures
C、comparisons
D、definitions
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/2XOK777K
0
大学英语六级
相关试题推荐
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousand(36)______;thatis,theyareexces
A、Mowtobuyagoodcomputer.B、Howtoborrowacomputerfromthecompany.C、Thepriceofthecomputer.D、Thenewly-boughtcompu
A、Aretirementparty.B、Afacultyreception.C、Aclassreunion.D、Abirthdayparty.DW:DoesJohnknowtheclassishavingasurp
Britain’sdependencyoncertainessentialserviceshasgreatlywidenedandbecomeakeyroleinthecountry’s______.According
In1942,Americans(36)______severalimportantvictoriesovertheJapanese.TheUnitedStatesnavy(37)______apowerfulJapane
A、Hemadeithimself.B、Hehadacarpentermakeit.C、Heboughtitalongtimeago.D、Hehadanoldonere-made.BW:Didyoumak
A、Onatrain.B、Onaship.C、Onaplane.D、Onabus.CW:Goodafternoon,I’mRoseanne,yourflightattendant.Welcomeaboard.M:
A、Shethinksherpayforthejobistoolow.B、Shebelievessheshouldbepromotedasamanager.C、Shethinksherjobcan’tmake
A、Two.B、Twenty-six.C、Twenty-eight.D、Thirty.CHowmanywordswasBabyabletosaybeforetherobbery?
IntheUnitedStates,theneedtoprotectplantandanimalspecieshasbecomeahighlycontroversialandsharplypoliticalissue
随机试题
如果f(x+y,x-y)=x2y+xy2,求f(x,y)及f(-3,1).
Shoppingforclothesisnotthe【C1】______experienceforamanasitisforawoman.Amangoesshoppingbecauseheneedssomethi
胸痛合并咯血的情况见于
()一般表示某个产业在国民经济中所占的份额。
压力表是指示容器内介质压力的仪表,是压力容器的重要安全装置。按其结构和作用原理,可以分为四类,下列正确的组合是()。①液柱式;②机械牵引式;③弹性元件式;④油压操纵式;⑤活塞式;⑥电量式
背景资料某大型泵站枢纽工程,泵型为立式轴流泵,装机功率6×1850kw,设计流量150m3/s。枢纽工程包括进水闸(含拦污栅)、前池、进水池、主泵房、出水池、出水闸、变电站、管理设施等。主泵房采用混凝土灌注桩基础。施工过程中发生了如下事件
诉讼权利的最长保护期限为( )年。
甲公司是一家汽车制造企业,主营业务是制造和销售x、Y、z三种型号乘用汽车。相关资料如下:资料一:X、Y、Z三种型号汽车的制造都需要通过一台生产设备,该设备是公司约束资源,年加工能力4000小时,公司年固定成本总额3000万元。假设X、Y、Z三种型
()被称为武器装备的“心脏”,是现代军事技术的核心和基础,广泛应用于雷达、计算机、通信设备、导航设备、火控系统、制导设备和电子对抗设备等各类军用设备上。
阅读材料,回答下列问题。 经济体制改革是在坚持社会主义制度的前提下,改革生产关系中不适应生产力发展的一系列环节,解放和发展社会生产力。经济体制的改革,首先在农村取得突破性进展。过去农村人民公社的体制,经营过于集中,分配上平均主义严重,不利于调动农民的积极
最新回复
(
0
)