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
29
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.
【30】
选项
A、surpassed
B、out-balanced
C、matched
D、rivaled
答案
C
解析
match意为“与……相符合”。寻找疫苗的结果令人失望,并不是因为没有超额完成,而是因为与期望不符。
转载请注明原文地址:https://kaotiyun.com/show/vODd777K
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?
Whatwasthefirststepinfightingagainstinfectiousdisease?
TheWTO’stransparentandnon-discriminatoryrulesrequireallmembercountriesto______.Thedevelopingcountriesthreatento
NoiseisAmerica’smostwidespread______.
NoiseisAmerica’smostwidespread______.
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
In1971therewereabout3,700millionpeopleintheworld.Ifthepopulationwere【C1】______evenlyovertheearth’ssurfacet
随机试题
发生交通事故后,防止二次事故的有效措施是什么?
下列选项中,属于法定担保物权的是()
在SE序列中,T1加权像是指
对被检者防护无关的是
“三同时”制度是指新建、改建、扩建工程的安全生产设施必须与主体工程()。
企业拟购买一套新设备以扩大生产能力,现有甲、乙两个方案可供选择。(1)甲方案:原始总投资为1000万元,项目计算期为5年,经营期每年所得税后净现金流量500万元。(2)乙方案:原始总投资为1200万元,项目计算期为10年,经营期每年所得
经营者违反《反垄断法》规定,达成并实施垄断协议的,可以采取的处罚有()。
下列关于行政程序的表述正确的是()。①行政程序是法律程序的一种②行政程序是行政机关实施行政行为必须遵循的方式、步骤、时间和顺序③行政程序的核心价值在于制约行政权力④行政程序和诉讼程序是完全不同的两种程序
简述教育的结构。
执行如下两条语句后,窗体上显示的是______。a=8.4326PrintFormat(a,"$00,00.00")
最新回复
(
0
)