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
31
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://jikaoti.com/ti/feEFFFFM
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
DifferentKindsofMeetingsNowadays,therearethousandsofinternationalmeetingsheldworldwideeveryyear.However,the
DifferentKindsofMeetingsNowadays,therearethousandsofinternationalmeetingsheldworldwideeveryyear.However,the
随机试题
修改权
泰勒在科学管理理论中提出了例外原则,其目的是解决【】
天王补心丹中的三参是
会计电算化环境下,属于审核记账员的责任是()。
某企业编制“直接材料预算”,预计第四季度期初存量400千克,预计生产需用量2000千克,预计期末存量350千克,材料单价为10元,若材料采购货款有80%在本季度内付清,另外20%在下季度付清,则该企业预计资产负债表年末“应付账款”项目为(
请选择最适合的一项填入问号处,使之符合整个图形的变化规律()。
在我国,关于犯罪和刑罚的法律规范可以由()制定。
ThesuccessofAugustusowedmuchtothecharacterofRomantheorizingaboutthestate.TheRomansdidnotproduceambitiousblu
When______difficultproblems,weshouldoftentakeanoptimisticattitude.
Tallmenaremorelikelytohavechildrenthantheirverticallychallengedfriendsbecausewomenfindheightattractive,anews
最新回复
(
0
)