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
Avian influenza (禽流感), or "bird flu", is an infectious disease of animals was caused by viruses that normally infect
Avian influenza (禽流感), or "bird flu", is an infectious disease of animals was caused by viruses that normally infect
admin
2010-04-30
48
问题
Avian influenza (禽流感), or "bird flu", is an infectious
disease of animals was caused by viruses that normally infect 【S1】______
only birds and, less commonly, pigs. Avian influenza viruses are
highly species-specific, but have, on rare occasions, crossed the
species barrier to infecting humans. 【S2】______
In domestic poultry (家禽), infection with avian influenza
viruses cause two main forms of disease, distinguished by 【S3】______
low and high extremes of virulence (毒性). The so-called
"low pathogenic (病原的)" form commonly causes only mild
symptoms and may easily go undetected. The highly pathogenic
form is far more dramatic. It spreads very rapidly through
poultry flocks, causes disease affecting multiple external organs, 【S4】______
and has a mortality that can approach 100%, often within 48
hours.
Bird flu is not the same as SARS. Because their symptoms 【S5】______
are similar, SARS is caused by completely different viruses.
Influenza viruses also are more infectious and cannot be as
readily contained as SARS isolating people who have the 【S6】______
infection.
The current outbreak of bird flu is different from earlier
ones in that officials have been unable to contain its spread. An
outbreak in 1997 in Hong Kong was the first time the virus had
spread to people, but it was much more quickly contained. A
total of 18 people were hospitalized with six reporting deaths. 【S7】______
About 1.5 million chickens were killed by an effort to remove 【S8】______
the source of the virus.
Unlike the 1997 scare, this outbreak has spread more rapidly
to other countries, increasing its exposure on people in varied 【S9】______
locations and raised the likelihood that the strain will combine 【S10】______
with a human influenza virus.
【S5】
选项
答案
Because → Although
解析
转载请注明原文地址:https://kaotiyun.com/show/igOK777K
0
大学英语六级
相关试题推荐
Althoughitisusuallyunclearwhostartsthegossip,peopletendtobelieveit.Ifagossipbringsgoodtothegossiping,the
A、Theweekendhasdecreasedinlength.B、Thenumberofnationalholidayshasincreased.C、Peopleworkfewerdaysperweek.D、Peo
Manymanufacturerswereaccusedofconcentratingtooheavilyoncostreduction,_____________________(往往是以产品的质量为代价).
A、Theanimalsover-fertilizethesoil.B、Deadplantrootscan’tholdthesoiltogether.C、Thewrongtypesofplantsareleftsta
A、Theydon’tgetridofflabbyarms.B、Theycandamagearmmuscles.C、Theyaren’tacceptabletomostpeople.D、Theycanraiseon
A、Sherecognizedtherobbers.B、Sheknewtherobbers’names.C、Shefoundthestolenproperty.D、Shereportedtherobbery.BHowd
A、Thelargenumberofpeoplewhowanttogetonlinedegrees.B、Thecountrieswhichprovideonlineeducation.C、Thecompanieswhi
A、PublicBusesarefastandcheaptransportationtools.B、Parkingisbecomingabigproblem.C、Subwaytrainsareevensaferthan
A、Aroomforfivepeople.B、Asingleroom.C、Ahoneymoonsuite.D、Adoubleroom.CWhatkindofroomdidthemanreserveatlast
A、Manysourcesofsurfacewaterhavebeenfound.B、Chemicalswerefoundinthewater.C、Agrowingpopulationneedmorecleanwat
随机试题
简述表见代理的构成要件。
可能发生肩难产的因素有哪些
牙髓治疗术要求的无菌操作不包括
中度缺钠时,病人每公斤体重缺氯化钠
作为党的生命,对人民民主具有重要的示范和促进作用的是()。
事实上,这种以曾经“作出大贡献”为由对贪腐干部深表同情的言论,眼下并不鲜见。应当承认,落马干部并非都________,有的在任上也的确曾经_______,为一个地方或单位作出过贡献。但如果仅因此就对其表示同情,甚至认为可以以功抵过,那就________了。
Specializationcanbeseenasaresponsetotheproblemofanincreasingaccumulationofscientificknowledge.Bysplittingupt
下列对重载函数的描述中,错误的是( )。
NisaburoandHirokoOhataareunlikemostJapanesecouplestheirage.Sure,Hiroko,58,isworriedaboutherhusband’shighblo
Aninvisibleborderdividesthosearguingforcomputersintheclassroomonthebehalfofstudents’careerprospectsandthosear
最新回复
(
0
)