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
30
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
【S1】
选项
答案
E
解析
spread传播。该句意为:然而,1997年在香港家禽中爆发禽流感时,发生了第一例从鸟类到人类的(病毒)传播。
转载请注明原文地址:https://kaotiyun.com/show/AzN7777K
0
大学英语四级
相关试题推荐
Adifficultorabusivebosscanpoisonthebestofjobs.Butyouarenotpowerless;beforeyouevenconsiderquitting,trytheb
Adifficultorabusivebosscanpoisonthebestofjobs.Butyouarenotpowerless;beforeyouevenconsiderquitting,trytheb
A、Itwillprobablyraintomorrow.B、Itwillrainmuchlaterintheweek.C、Heneedstobuyanotherumbrella.D、Theweatherforec
Whenitcomestoshopping,thestoreshereintheUnitedStatesareoftenoversuppliedbecauseofthecompetitivenessofAmerica
A、Stayhometoprepareforhisexam.B、Gototheconcertwiththewoman.C、Attendtheconcertaftertheexam.D、Askthewomanto
Forcenturiesmandreamedofachievingverticalflight.In400A.D.Chinesechildren【S1】______withafan-liketoythatspunup
GreatInventionsTherearesomethingsweuseeveryday.Canyouimagineaworldwithoutzippers(拉链)tofastenclothing?Ha
FootballModernfootballoriginatedinEnglandinthe19thcentury.Thefirstinternationalfootballmatchwasplayedin187
Lifeinsuranceisn’tfuntobuy.Itforcesyoutothinkaboutyourdeath:asubjectmanyprefernotto【B1】______.Butthere’sa
A、Doctorandpatient.B、Passengerandbusdriver.C、Customerandmerchant.D、Bossandsecretary.B从"Howmuchisthefare?"便可断定对话
随机试题
编写一个函数,从传入的num个字符中找出最长的一个字符串,并通过形参指针max传回该串地址(用****作为结束输入的标志)。注意:部分源程序给出如下.请勿改动主函数main和其他函数中的任何内容,仅在函数fun的花括号中填入所编写的若干语句
下列说法中错误的是______。
A.郄穴B.经穴C.合穴D.原穴脘腹隐痛,喜温喜按,病程久者,治宜选用
嘌呤核苷酸从头合成时GMP的C-2氨基来自
下列关于根尖1/3根折的描述,不正确的是
A.脾虚证B.肾虚证C.血瘀证D.血热证E.气滞证固本止崩汤治疗崩漏的适应证候是
我国现行的《会计法》规定的内容有()。
(2016)结合“二孩”政策的全面实施,请简述教育优化人口的功能。
《洪湖赤卫队》中的洪湖现在位于()省。
交通肇事致一人以上重伤,负事故全部或者主要责任,并具有哪些情形的以交通肇事罪定罪处罚?()
最新回复
(
0
)