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
29
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] 【S5】
选项
答案
Because → Although
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3009521.html
相关试题推荐
Everhearofthelemming(旅鼠)?Lemmingsarearcticrat-likeanimalswithave
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Iftheearthgetshotterinthenewcentury,whatwillhappentoanimalsand
Onlythehardiestanimals__________(才能在严寒中生存).cansurvivetheseverecoldness
随机试题
[audioFiles]2016m6x/audio_ezfj_009_201605[/audioFiles]O
交易所是期货成交合约双方的中介,作为卖方的买方和买方的卖方,扮演双重角色,应保证合约的严格履行。交易所是期货交易的直接管理者,这就决定了交易所的风险监控是整个市
Ifyouevergetamouthfulofoceanwater,you’llfindit’sverysalty.How
DifferentTypesofLearningI.Thedefinitionoflearning
其实中年人是人生盛华的开始,不应贪婪,不应享受。Inactualfact,,middleagerepresentstheprimeofone’
[originaltext]Tofinishtoday’sprogram,IwanttotellyouabouttheWater
下列情形中,应当办理房屋转移登记的有()。(2008年真题)A.部分房屋拆除
下列选项中,2020年各季度全国中心城市客运总量环比增速从低到高排序正确
针对新冠肺炎疫情居家防控期间多发的亲子关系紧张问题,某社会工作服务机构通过组建社
男性,35岁。10天前抬重物扭伤腰部,腰痛伴右下肢后外侧放射痛,无大小便功能障
最新回复
(
0
)