首页
登录
职称英语
Historically, the spread, prevalence, and very existence of contagious disea
Historically, the spread, prevalence, and very existence of contagious disea
游客
2025-04-03
14
管理
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. [br] 【R1】
选项
答案
B
解析
本题的前一句提到“Historically,the spread,prevalence,and very existence ofcontagious disease have wholly depended on the growth and concentration of human populations.”,传染病因为人口的增多而大面积传播,选项中只有B能承接此句。
转载请注明原文地址:https://tihaiku.com/zcyy/4024082.html
相关试题推荐
A、riseB、existenceC、occurrenceD、increaseA四个选项的意思是:A项rise“增长,上升”;B项existence“增
Today,cigarettesmokingisawidespreadhabit.About43percentoftheadul
Today,cigarettesmokingisawidespreadhabit.About43percentoftheadul
Today,cigarettesmokingisawidespreadhabit.About43percentoftheadul
Today,cigarettesmokingisawidespreadhabit.About43percentoftheadul
Thereiswidespreadbeliefthattheemergenceofgiantindustrieshasbeena
Widespreadwagereductionswereimposedduringtherecessionof1906-1909andpr
Electronicmailhasbeeninwidespreaduseformorethanadecade,simplifyi
Electronicmailhasbeeninwidespreaduseformorethanadecade,simplifyi
Electronicmailhasbeeninwidespreaduseformorethanadecade,simplifyi
随机试题
Forthispart,youareallowed30minutestowriteashortessayentitledOn
下列()发生时,承运人需要承担责任。A.承运人证明为了避免延误损失的发生已经
Lotsofrescueworkerswereworkingarou
列传播类型中,属于所有传播活动基础的是()A.人际传播 B.群体传播 C.
施工段的划分应尽量与工程对象平面特点相适应,尽量维护结构整体性,利用结构界限,如
《中华人民共和国商业银行法》规定,商业银行的流动性比例应当不低于50%。()
某场地地层剖面为三层结构,地层由上至下的电阻率关系为ρ1>ρ2、ρ2<ρ3,问本
商业助学贷款实行分次放款的形式。()
下列各项关于蓝海战略的表述中,正确的是()。A.“蓝海”的开创是基于价值的
采用设计施工总承包,工程竣工验收未能通过,经过承包人修正缺陷再次验收检验合格。这
最新回复
(
0
)