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
40
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.
【R3】
选项
答案
A
解析
本题前的上一句提到“…which are unable to spread and survive in low populationdensities”,本题的答案应与此相对应,选项A符合此意。
转载请注明原文地址:https://kaotiyun.com/show/zwFO777K
0
考博英语
相关试题推荐
Inthispart,youareaskedtowriteacompositiononthetitleof"EffectofResearchEventonMyLaterLifeandWork"withno
InmostSouthAmericancountriesrailtransportisplaguedbyoperationalproblemsaswellasbyobsoleteequipment.
Duetosluggishmarketconditions,thefactory’sworkforcehas_____fromover4,000toafewhundred.
Povertyanddomesticviolencemakeiteasyforhertotrustthatbadthingswillhappenandtakethis_____happinessaway.
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehumans,plantscanhavethei
AstheyturnedintoUpshotRisewherehisparentslived,JackletgoofRuth’shand.UpshotRisewasnotahand-holdingstreet.W
Seariseasaconsequenceofglobalwarmingwouldimmediatelythreatenthatlargefractionoftheglobelivingatsealevel.Nea
Thecraftychildtrickedhisinnocentbrother,aparticularly______andtrustingboy,intocommittingamischievousprank.
Themulti-billion-dollarWesternpopmusicindustryisunderfire.ItisbeingblamedbytheUnitedNationsforthedramaticris
随机试题
A.养阴润燥,清肺利咽B.清热化痰,宣肺止咳C.清肺止咳,化痰通便D.解表化饮,止咳平喘E.清肺润燥,化痰止咳急支糖浆的功能是()。
乳腺癌特征性的乳腺体征是
根据新修订的《中华人民共和国公司法》(2006年1月1日起施行)的规定,公司分为()形式。
一般地,在证券指令驱动下,如果在同一价格上有多笔交易指令,此时会遵循()的成交原则。
企业出售无形资产所取得的净收益,应计入()科目。
下列不属于影视广告与其他媒体相比的明显优势的有()。
习近平总书记在《告台湾同胞书》发表40周年纪念会上指出,我们对台湾同胞一视同仁,将继续率先同台湾同胞分享大陆发展机遇,为台湾同胞台湾企业提供同等待遇。为贯彻习近平总书记的相关讲话精神,《关于进一步促进两岸经济文化交流合作的若干措施》印发。下列相关说法错误的
国际分工的发展过程及其对国际贸易的影响。
下列程序中通常不属于板级支持包(BSP)内容的是()。
Faces,likefingerprints,areunique.Didyoueverwonderhowitispossibleforustorecognizepeople?Evenaskilledwriterp
最新回复
(
0
)