首页
登录
职称英语
In 1957 a doctor in Singapore noticed that hospitals were treating an unusua
In 1957 a doctor in Singapore noticed that hospitals were treating an unusua
游客
2025-02-01
26
管理
问题
In 1957 a doctor in Singapore noticed that hospitals were treating an unusual number of influenza-like cases. Influenza is sometimes called "flu" or a "bad cold". He took samples from the throats of patients in his hospital and was able to find the virus of this influenza.
There are three main types of the influenza virus. The most important of these are type A and B, each of them having several subgroups. With the instruments at the hospital, the doctor recognized that the outbreak was due to a virus in group A, but he did not know the subgroup. Then he reported the outbreak to the World Health Organization in Geneva. WHO published the important news alongside reports of a similar outbreak in Hong Kong, where about 15-20 percent of the population had become ill.
As soon as the London doctors received the package of throat samples, doctors began the standard tests. They found that by reproducing itself with very high speed, the virus had grown more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs against all the known subgroups of virus type A. None of them have any protection. This, then, was something new, a new influenza virus, against which the people of the world had no help whatever.
Having found the virus they were working with, the two doctors now dropped it into the noses of some specially selected animals, which get influenza much as human beings do. In a short time the usual signs of the disease appeared. These experiments proved that the new virus was easy to catch, but that it was not a killer. Scientists, like the general public, call it simply Asian flu.
The first discovery of the virus, however, was made in China before the disease had appeared in other countries. Various reports showed that the influenza outbreak started in China, probably in February 1957. By the middle March it had spread all over China. The virus was found by Chinese doctors early in March. But China is not a member of the WHO and therefore does not report outbreaks of disease to it. Not until two months later, when travelers carried the virus into Hong Kong, from where it spread to Singapore, did the news of the outbreak reach the rest of the world. By this time it was well on its way around the world. [br] Without counting the subgroups, there are______type(s) of influenza.
选项
A、one
B、two
C、three
D、four
答案
C
解析
细节题型见第二段第一、二句:There are three main types of the influenza virus.The most important of these are type A and B,each of them having several subgroups.(这种流感病毒主要有三种类型。其中最主要的是A类和B类病毒,而每类病毒都有几种附属的亚病毒。)因此C为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3938526.html
相关试题推荐
In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusua
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
Thepatientstronglyobjectedto______likethis.A、betreatedB、treatingC、being
Doctorsprescribemassivedosesofpenicillinforpatientswithpneumonia.A、gros
Thedoctorpreferredtoresignratherthanbeaccusedpubliclyofinfamouscondu
Doctorswarnedsun-starvedtouristswhoreceivedtoomuchsunlightthattheywer
Theadvocates—mainlyfamilytherapydoctors—areapplyinganewapproachtoevery
随机试题
AnexhibitionofCarletonWatkins’sphotographsofYosemitetakeninthe186
Gettinganonlinedegreethroughdistancelearninghasbecomepossiblebecau
Directions:Inthispart,youwillhave15minutestogooverthepassagequickl
在VisualFoxPro中,数据的完整性不包括A.实体完整性 B.域完整性
粉剂的主要基质组成不包括A.药物 B.氧化锌 C.滑石粉 D.淀粉 E.
塑料排水板顶端埋入砂垫层的长度不应小于()m。A、0.3 B、0.5 C
患者,男,65岁。慢性咳嗽、咳痰20年,伴喘息7年,加重1周。吸烟40年,1包/
(异)螺旋甾烷型皂苷的结构特征有A.B/C环和C/D环反式稠合 B.A/B环反
根据《评标委员会和评标方法暂行规定》(七部委第12号),下列关于评标委员会的
《建设项目安全设施“三同时”监督管理暂行办法》对建设项目安全设施施工作出规定,下
最新回复
(
0
)