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
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name
admin
2013-07-02
69
问题
One of the most important organizations designed to combat fatal infectious diseases in poor countries goes by the unwieldy name of the Global Fund to Fight AIDS, Tuberculosis and Malaria. The link between the first two is well established. AIDS does not kill directly. Rather, the damage it does to the immune system opens an individual to other infections that would frequently be fought off by a healthy body. Of these, tuberculosis is one of the most important. Some 12% of deaths of people infected with HIV, the virus mat causes AIDS, are from tuberculosis, and, conversely, 16% of tuberculosis deaths are AIDS-related. The disease of malaria kills a lot of people — at least 1 million a year, although the exact figure is hard to come by — but there was little obvious medical connection between it and the other two.
No longer. Over the past few years a number of studies have suggested mat those who are infected with HIV are more susceptible to malaria, and that the malaria parasite, in turn, raises the number of virus particles in those with HIV. Now, a study published in Science by Laith Abu-Raddad of the University of Washington, in Seattle, and his colleagues has tried to put some numbers on the problems.
The study’s starting point is that the number of virus particles in the blood of someone infected with HIV increases about ten-fold during an attack of malaria. This seems to be due, paradoxically, to the immune system’s response to the malarial parasite. That response produces proteins called cytokines, which have the perverse effect of encouraging HIV to replicate.
The increase in the number of virus particles is transient, and may do little harm to the individual’s own long-term prospects, but it does make him(or her)more likely to pass the infection on during sex. Conversely, the damage HIV does to the immune system means that the malarial parasite can more easily breed unchecked. That means people are more susceptible to infection in the first place, and that more parasites are available to be transmitted from person to person by the mosquitoes that spread them. Dr. Abu-Raddad and his colleagues looked at past studies and came up with a set of numbers that can be plugged into a mathematical model they have developed of how, based on other papers, they think the diseases interact. They then applied the model to Kisumu, a part of Kenya that has a high prevalence of both diseases.
The model suggests the peak of the HIV epidemic in Kisumu is 8% higher than what it would have been if there were no interaction between the diseases, while the peak level of malaria is 13% higher. Moreover, and in contrast to tuberculosis, where the peak lags seven years behind that of HIV, malaria peaked only one year after the peak of the HIV epidemic.
What would be the best title for the passage?
选项
A、A Mathematical Model for AIDS
B、The Global Fund to Fight Diseases
C、Three Hard Diseases Troubling the World
D、AIDS and Malaria — A Vicious Circle
答案
D
解析
主旨大意题。从文章内容来看,主要是考证艾滋病和疟疾之间的关系。其中也提到了肺结核,但它不是文章的主体,文章从一开始就指出艾滋病和疟疾之间的关系尚没有确定,而在接下来的段落里就是用研究来说明这两者的关系,所以选项[D]正确,不仅指出了主体,还点明了两者的关系。
转载请注明原文地址:https://kaotiyun.com/show/7cn7777K
0
大学英语六级
相关试题推荐
A、Itfocusesonthedevelopmentofthestudent’sabilityforindependentscholarlyworkinaparticularfield.B、Itfocuseson
A、Intheafternoon.B、Inthemorning.C、Duringlunch.D、Duringdinner.B选项和时间有关。从Thecampusradiostationiswillingtoletyou
Formanyfamilies,figuringouthowmanyafter-schoolactivitiesaretoomanyisastruggle.Forparentswhofearthey’re"over-
A、Itincreasedthestudents’whitebloodcellcount.B、Itincreasedsomestudents’energylevel.C、Itimprovedthestudents’abi
Anexerciseprogramdesignedforyoungeradultsmaybeinappropriateforolderpersons,particularlyforpersonsoverage50.Sp
Parentsareoftenupsetwhentheirchildrenpraisethehomesoftheirfriendsandregarditasaslur(诽谤,中伤)ontheirowncooki
Amillionmotoristsleavetheircarsfilledupwithpetrolandwiththekeysintheignitioneveryday.Thecarsaresittingin
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】_____.It’snowa"globalvillage"wherecountriesareonlyse
Activitiessuchaseatingandshoppingaregenerallyincludedin"play".Todayleisuremeansthetimeinwhichwehavenothing
EversincethemodemOlympicGamesbeganin1896,they’vehadtheircritics.Everyformof【B1】______activityinvitestrouble.Bu
随机试题
螺旋面如何展开?
ThereisnothingnewaboutTVandfashionmagazinesgivinggirlsunhealthyideasabouthowthintheyneedtobeinordertobec
A.壁细胞B.主细胞C.黏液细胞D.G细胞E.肥大细胞胃蛋白酶产生于
某公司当初以100万元购入一块土地,目前市价为80万元,如欲在这块土地上兴建厂房,则()。
甲签发一张票据给乙,乙将票据背书转让给丙,丙受丁胁迫将票据背书转让给丁,丁又将该票据赠与不知情的戊。根据票据法律制度的规定,下列说法中不正确的有()。
甲开了一家汽车维修公司,在维修汽车时,甲夸大汽车损毁程度,向保险公司多报汽车修理费用,骗取保险公司12万余元,甲的罪名应该()。
下列行政公文格式正文中的结尾部分,写法不妥当的是()。
虽然知识产权本质上是程度不一的知识垄断.但是由知识产权引起的知识垄断情形中的“垄断”含义与传统的反垄断法中“垄断”的含义有很大区别。由知识产权引起的“知识垄断”,主要是指知识产权法授予的排他权:如果该种排他权导致了相应产品或服务的市场垄断,那么“知识垄断”
下列选项中,不是算法基本特征的是()。
Lackofculture,orratheranexcessofthewrongsortofculture,isoftenconsideredtobesynonymouswithdisadvantage.Mostc
最新回复
(
0
)