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
75
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.
【R5】
选项
答案
F
解析
文章的最后一段主要讲述各种疾病暴发的源地,选项F与此意相近,是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/K5FO777K
0
考博英语
相关试题推荐
Byfarthemostcommondifficultyinstudyissimplefailuretogetdowntoregularconcentratedwork.Thisdifficultyismuchg
Byfarthemostcommondifficultyinstudyissimplefailuretogetdowntoregularconcentratedwork.Thisdifficultyismuchg
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,ofcourse,thatthechimpanzeehasnotdevelopedthe
Ahundredyearsagoitwasassumedandscientifically"proved"byeconomiststhatthelawsofsocietymakeitnecessarytohave
Seariseasaconsequenceofglobalwarmingwouldimmediatelythreatenthatlargefractionoftheglobelivingatsealevel.Nea
Priortothe20thcentury,manylanguageswithsmallnumbersofspeakerssurvivedforcenturies.Theincreasinglyinterconnected
Althoughwedecoratedtheroomonlysixmonthsago,thepaintontheceilingisalready_____becauseofthedamp.
Clonaid,acompanyassociatedbyagroupthatbelievesextraterrestrialscreatedmankind,announcedFridaythatithadproduced
HowtoDoFewer,BetterAnimalExperimentsForanationofpetlovers,Britainconductsasurprisingnumberofexperimentso
ThemanwhoinventedCoca-ColawasnotanativeAtlantan,butonthedayofhisfuneraleverydrugstoreintowntestimoniallysh
随机试题
下列量中属于国际单位制导出量的有________。
氰化物中毒时皮肤黏膜呈樱桃红色的原因是
某染料制造企业以苯经硝化制得产品为硝基苯,作为制造染料的原料。下列关于硝化工艺安全控制的基本要求中,说法错误的是()。
根据《中华人民共和国计量法》的规定,计量检定工作应当按照()的原则,就地就近进行。
1.背景某办公楼工程,建筑面积82000m2,地下3层,地上22层,钢筋混凝土框架剪力墙结构,距邻近六层住宅楼7m。地基土层为粉质黏土和粉细砂,地下水为潜水,地下水位一9.5m,自然地面一0.5m。基础为筏板基础,埋深14.5m,基础底板混凝土厚1500
受托方代收代缴消费税为( )元。支付加工费的进项税额为( )元。
六西格玛管理的主要度量指标有()。经过检验,均值未偏移,过程处于统计控制状态和技术控制状态,样本标准差s=0.1,则Z0=()。
甘肃位于中国西北内陆腹地,地处黄河上游。()
以其记载或表达的思想内容,证明案件真实情况的证据是()。
Youngpeoplealwayssufferinrecessions.Employersstop【C1】______thembecausetheyareeasiertosack.Butin【C2】______episodes
最新回复
(
0
)