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
27
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
【S9】
选项
答案
J
解析
little很少的。该句意为:由于这些病毒一般不感染人类,因此人类有很少或完全没有抵御他们的免疫保护。
转载请注明原文地址:https://kaotiyun.com/show/RzN7777K
0
大学英语四级
相关试题推荐
Inmanycountries,itisnot【B1】______forfamiliesofdifferent【B2】______tolivetogetherinsharedspace.However,intheUni
Inmanycountries,itisnot【B1】______forfamiliesofdifferent【B2】______tolivetogetherinsharedspace.However,intheUni
Inmanycountries,itisnot【B1】______forfamiliesofdifferent【B2】______tolivetogetherinsharedspace.However,intheUni
Inmanycountries,itisnot【B1】______forfamiliesofdifferent【B2】______tolivetogetherinsharedspace.However,intheUni
Internetvotinghappensallthetime,butusuallyit’sconfinedtotopicssuchas"WhoisthecutesteastmemberofPartyofFiv
Internetvotinghappensallthetime,butusuallyit’sconfinedtotopicssuchas"WhoisthecutesteastmemberofPartyofFiv
Internetvotinghappensallthetime,butusuallyit’sconfinedtotopicssuchas"WhoisthecutesteastmemberofPartyofFiv
随机试题
患者,女,36岁。因重症肺炎入住呼吸科,住院第2天床边监测提示出现心房颤动,患者心悸,头晕,胸闷,测血压为80/50mmHg,应立即采取的治疗是
下列属于合同磋商中个别交易条件的有()
女性患者,52岁。双下肢发绀,皮温低,给予按摩使皮肤转暖,发绀消退,该患者的发绀可能由于
下面疾病中外周血一般不出现幼稚粒细胞的是()
A、10%葡萄糖酸钙B、50%葡萄糖C、氨茶碱D、维生素CE、10%氯化钾患者出现低血糖时静脉推注的药物
已知某砂土emax=1.40,emin=0.70,e=1.10,则相对密实度Dr为()。
下列关于季节性冻土地基中,桩基设计特点描述中,正确的是()。
健康证明
下列叙述中,错误的是()。
Thispartistotestyourabilitytodopracticalwriting.Youarerequiredtowriteanoticeaccordingtotheinformationgiven
最新回复
(
0
)