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
Historically, the spread, prevalence, and very existence of contagious disease have wholly depended on the growth and concentrat
Historically, the spread, prevalence, and very existence of contagious disease have wholly depended on the growth and concentrat
admin
2017-06-11
78
问题
Historically, the spread, prevalence, and very existence of contagious disease have wholly depended on the growth and concentration of human populations.【R1】______And though the last century has witnessed substantial worldwide success in combating many past scourges—such as polio and smallpox—infectious diseases still claim more lives than any other group of diseases. The prevailing demographic trends continue to create a crowded human " medium" that both invites and is vulnerable to infection.
The share of humanity living in cities with more than 1 million people has surged from less than 5 percent in 1900 to nearly 40 percent today, creating the ideal setting for the resurgence of old infectious diseases as well as the development of new ones.【R2】______
Overcrowding—the increased proximity of susceptible individuals—is a principal risk factor for the incidence and spread of all major infectious diseases, including tuberculosis, dengue fever, malaria, and acute respiratory illnesses, which are unable to spread and survive in low population densities.【R3】______
Aside from sheer growth and increasing density, the urbanization under way in developing nations is often accompanied by deteriorating health indicators and increased exposure to disease risk factors.
Access to clean water, good hygiene, and adequate housing are sorely lacking in developing nations. As a result, waterborne infections such as cholera and other diarrheal diseases account for 90 percent of all infectious diseases in developing countries—and 40 percent of all deaths in some nations.【R4】______
In both industrial and developing nations, incidences of a wide range of infectious diseases, including tuberculosis, diarrheal diseases, and HIV/AIDS, are considerably higher in urban slums— where poverty and compromised health define the way of life—than in the rest of the city.【R5】______
A. Key disease carriers, such as insects and rats, thrive in crowded urban settings, further facilitating spread.
B. The unprecedented population densities in fourteenth-century Europe, for example, led to the plague outbreak that claimed the lives of one fourth of the population.
C. Although these infections are easily preventable if adequate water and sanitation are available, the vast majority of the world’s population is lifelong victims.
D. While new global markets have created unprecedented economic opportunities and growth, the health risks of our increasingly interconnected and fast-paced world continue to grow.
E. Pathogens can more readily establish in large populations, since all infectious diseases require a critical number of vulnerable individuals in order to take root and spread.
F. These areas can serve as a perpetual reservoir of disease or disease vectors, placing other parts of the city at risk of an outbreak and allowing the disease to continue evolving, often into a deadlier strain.
【R4】
选项
答案
C
解析
从本题的前一句“As a result,waterborne infections such as cholera and otherdiarrheal diseases…and 40 percent of all deaths in some nations.”可知,水生的传染病在许多国家大面积传播,导致很多人丧命,本题的答案是对此问题的总结,C符合此意。
转载请注明原文地址:https://kaotiyun.com/show/75FO777K
0
考博英语
相关试题推荐
Readthefollowingpassagecarefullyandthenparaphrasethenumberedandunderlinedparts.("Paraphrase"means"toexplainthem
Thehumanbraincontains10thousandmillioncellsandeachofthesemayhaveathousandconnections.Suchenormousnumbersused
Itisfutiletodiscussthematterfurther,because_____goingtoagreeuponanythingtoday.
Themanagergaveherhis_____thatthecomplaintwouldbeinvestigated.
Clonaid,acompanyassociatedbyagroupthatbelievesextraterrestrialscreatedmankind,announcedFridaythatithadproduced
EdithSmithofNewYorkwasconcernedabouther18-month-olddaughter,Amanda.Thedaughterdidnotrespondwhenherparentsspok
Everyoneitseemshasahealthproblem.AfterpouringbillionsintotheNationalHealthService,Britishpeoplemoanaboutdirty
Everyoneitseemshasahealthproblem.AfterpouringbillionsintotheNationalHealthService,Britishpeoplemoanaboutdirty
Sinceateacher’sresponseonastudent’spaperispotentiallyaninfluentialtextinawritingclass,weneedtoexamineourpra
IhaveavegetablegardenandeverysummerIenjoyeatingmyownvegetables.OnedaylastsummerIpickedadozencarrots.Usual
随机试题
下列有关企业发生的全部成本转为费用的方式表述正确的有()。
网络时代沟通的特征有()
与水液代谢关系最密切的脏是()与血液运行关系最密切的脏是()
甲公司于2007年3月2日签发同城使用的支票1张给乙公司,金额为10万元人民币,付款人为丁银行。次日,乙公司将支票背书转让给丙公司。2007年3月17日,丙公司请求丁银行付款时遭拒绝。丁银行拒绝付款的正当理由有()。
资产负债比率的正确计算公式是()
证券投资基金在美国被称为()。
下列电子支付方式中,可以确保商家看不到客户相关支付隐私信息的是()。
心理定势对解决问题具有()
幸福教育是师生发挥主体创造性的教育。在幸福教育中,师生都是教育活动的创造者。师生在教育活动中是主动还是被动,是创造的活动还是机械的活动,直接决定着教育的状态和境界。没有教育者的主观能动性的发挥,亦没有教育者的主体性,没有教育者的创造性,幸福教育就很难体现崇
Ineverycultivatedlanguagetherearetwogreatclassesofwords.They,takentogether,【C1】______thewholevocabulary.First,t
最新回复
(
0
)