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
The H5N1 virus does not usually infect humans. In 1997, however, the first case of【S1】______ from a bird to a human was seen du
The H5N1 virus does not usually infect humans. In 1997, however, the first case of【S1】______ from a bird to a human was seen du
admin
2010-06-01
26
问题
The H5N1 virus does not usually infect humans. In 1997, however, the first case of【S1】______ from a bird to a human was seen during an outbreak of bird flu in poultry in Hong Kong. The virus【S2】______ severe respiratory illness in 18 people, 6 of whom died. Since that time, there have been other cases of H5N1 infection among humans. Most recently, human cases of H5N1 infection have【S3】______ in Thailand, Vietnam and Cambodia during large H5N1 outbreaks in poultry. The death【S4】______ for these reported cases has been about 50 percent. Most of these cases occurred from【S5】______ with infected poultry or contaminated surfaces; however, it is thought that a few cases of human-to-human spread of H5N1 have occurred.
So far, spread of H5N1 virus from person to person has been【S6】______ and spread has not continued【S7】______ one person. However, because all influenza viruses have the ability to change, scientists are【S8】______ that the H5N1 virus could one day be able to infect humans and spread easily from one person to another. Because these viruses do not commonly infect humans, there is【S9】______ or no immune protection against them in the human population. If the H5N1 virus were able to infect people and spread easily from person to person, an "influenza pandemic" (worldwide outbreak of disease) could begin. No one can predict when a pandemic might occur. However, experts from around the world are watching the H5NI situation in Asia very【S10】______ and are preparing for the possibility that the virus may begin to spread more easily and widely from person to person.
A) number B) concerned C) caused D) over
E) spread F) contact G) beyond H) absent
I) forgotten J) little K) occurred L) slightly
M) rare N) closely O) rate
【S4】
选项
答案
O
解析
rate比率;death rate死亡率。后半句中的提示词“50 percent”可以帮助选出正确单词。
转载请注明原文地址:https://kaotiyun.com/show/jzN7777K
0
大学英语四级
相关试题推荐
Whatmakesafullman?AccordingtoFrancisBacon,thecelebratedEnglishPhilosopher,theonlyfactorbywhicha"fullman"can
Mostpeoplethinkcancerisadiseaseofrichwesterncountries.Nolongeritisnow.Morethanhalfofthe6millionpeoplewho
DoctorsinBritainarewarningofanobesitytimebomb,whenchildrenwhoarealreadyoverweightgrowup.So,whatshouldwedo?
TheadultsintheUnitesstatesconstituteaworkforceofabouteighty-onemillionemployedpeople,ofwhomonlytwenty-sevenm
Nextyear,ifallgoesasplanned,thelargestmakerofpersonalcomputersinAsiawillbecomethethirdlargestintheworld.
Nextyear,ifallgoesasplanned,thelargestmakerofpersonalcomputersinAsiawillbecomethethirdlargestintheworld.
Nextyear,ifallgoesasplanned,thelargestmakerofpersonalcomputersinAsiawillbecomethethirdlargestintheworld.
AninternationalteamofscientistsisstudyingtheproblemofpollutionanddustinAsia.Onehundredthirtyscientistsfrom
Automationreferstotheintroductionofelectroniccontrolandautomaticoperationofproductivemachinery.Itreducesthehuma
随机试题
下列哪项不是痢疾的主要病理变化
下列不属于行政支持类事业单位的是()
依照《环境影响评价法》的规定,上报的北京市旅游规划草案中未附送环境影响报告书,应( )。
1月26日,计提管理人员的福利费8000元,请填制记账凭证。
甲企业许可乙企业使用其生产可视对讲电话的专利技术,已知条件如下:甲企业与乙企业共同享用可视对讲电话专利,甲乙企业设计能力分别为150万部和50万部:该专利为甲企业外购,账面价值100万元,已使用4年,尚可使用6年,假设前4年技术类资产累计价格上涨率为15%
价值工程中,方案评价的内容应包括()。
"______?""It’shalfpastfour."
Whenacompanyunexpectedlyfindsitselflosingmarketshareandtakingabeatingatthehandsofitscompetitors,it’saclear
AP接入点(AccessPoint)是用于无线网络的无线HUB,是无线网络的核心。它是移动计算机用户进入有线以太网骨干的接入点,AP可以简便地安装在天花板或墙壁上,它在开放空间最大覆盖范围可达()米,无线传输速率可以高达11Mbps。
“一个事务完成后,它对数据库的改变必须是永久的,即使系统可能出现故障。”这是事务的()。
最新回复
(
0
)