首页
登录
职称英语
Avian influenza (禽流感), or "bird flu", is an infectiousdisease of animals wa
Avian influenza (禽流感), or "bird flu", is an infectiousdisease of animals wa
游客
2023-09-13
13
管理
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. [br] 【S2】
选项
答案
infecting → infect
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3009518.html
相关试题推荐
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Onlythehardiestanimals__________(才能在严寒中生存).cansurvivetheseverecoldness
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
随机试题
Whichofthefollowingbestdescribeshim?[originaltext]Hecamebackfromthef
A.43 B.34 C.12 D.14
下列各项中,属于效益审计常用定性分析方法的有:A、内容分析法 B、回归分析法
A.血浆蛋白结合率B.药物的吸收速度C.解离度大D.解离度小E.解离不变药物在体
用以表示挥发油中游离羧酸、酚类和酯类成分总量的指标,通常称之为A.皂化值 B.
下列作用与阿托品阻断M胆碱受体无关的是A.升高眼压 B.抑制腺体分泌 C.松
某孕妇,28岁。妊娠28周,护士在为其进行营养健康教育时,应告知她每周体重增长不
各种不同的武术动作的迁移属于( )。A.同化性迁移 B.顺应性迁移
根据《商业银行大额风险暴露管理办法》,大额风险暴露是指商业银行对单一客户或一组关
施工方进度控制的任务是依据()对施工进度的要求控制施工进度。 A.监
最新回复
(
0
)