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
Among the devastating consequences of AIDS has 【21】______ its epidemic spread in the developing world. The disease has cause
Among the devastating consequences of AIDS has 【21】______ its epidemic spread in the developing world. The disease has cause
admin
2010-07-06
50
问题
Among the devastating consequences of AIDS has 【21】______ its epidemic spread in the developing world. The disease has caused 【22】______ suffering, debilitation, loss of life and disruption of family, social and economic 【23】______ Because of the considerable expense and logistical difficulty in providing antiviral drugs to populations 【24】______ with the Human Immunodeficiency Virus 【25】______ the world, the biomedical community is looking towards vaccines to help solve this compelling problem.
The search for an AIDS vaccine began more than 15 years ago with great 【26】______ and high expectations. With the 【27】______ of the Human Immunodeficiency Virus (HIV) as the cause of AIDS, it seemed that a 【28】______ would follow closely behind. But despite a large concerted effort, the problem has proven more difficult than 【29】______ , and progress has not 【30】______ the 【31】______ hopes. Here I review the 【32】______ scientific obstacles confronting the development of an effective HIV vaccine, and I consider 【33】______ strategies to overcome these obstacles.
It is instructive to consider the circumstances that have 【34】______ to past successes in vaccine development. The smallpox vaccine is 【35】______ the most successful inventions in the history of 【36】______ Why, 200 years ago, without the benefit of modern biotechnology, did the smallpox vaccine succeed so readily while an AIDS vaccine 【37】______ elusive? The answer lies in an experiment of nature that provided, to an astute observer, a clear direction for smallpox vaccine development. In this classic story of 【38】______ discovery, Edward Jennet noticed that milk maids who had previously contracted cowpox were 【39】______ to smallpox infection. This observation was the critical event leading to the finding that the cowpox virus cross-reacted immunologically with the smallpox virus and could 【40】______ be used to protect against smallpox.
【37】
选项
A、slowly
B、fails
C、remains
D、counts
答案
C
解析
本题的关键在于理解elusive“捉摸不定的,无法把握的”,所以应选 remains。因为艾滋病疫苗的研究至今依然没有实质性进展。
转载请注明原文地址:https://kaotiyun.com/show/uODd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Whatwasthefirststepinfightingagainstinfectiousdisease?
NoiseisAmerica’smostwidespread______.
NoiseisAmerica’smostwidespread______.
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
随机试题
关于下腔静脉DSA检查技术错误的是
《中华人民共和国证券投资基金法》规定,开放式基金的登记业务()。
下列会计事项中,不属于或有事项的是()。
下列行政复议情形中,需终止行政复议的是()。
以下实验设计方法中不要求有控制组或对照组的是( )。
2013年,我国国内生产总值568845亿元,比上年实际增长7.7%。其中,第一产业增加值56957亿元,第二产业增加值249684亿元,第三产业增加值262204亿元。第一产业增加量占国内生产总值的比重为10.0%,第二产业增加值比重为43.9%,第三产
小男孩宋华6岁时父亲去世,15岁时母亲瘫痪,但他微笑面对生活,终于考上大学,并带着母亲上大学,他的事迹被媒体报道之后引起了巨大反响,对这件事你有什么感想?
下列关于信息系统建设业务分析的描述中,不正确的是
Impatiencecharacterizesyoungintellectualworkers.Theywanttomaketheirmark【C1】______.Soit’simportanttoget【C2】______t
Beinganinformationtechnology,orIT,workerisnotajobIenvy.Theyaretheoneswho,rightinthemiddleofacriticalmee
最新回复
(
0
)