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
2024-01-01
23
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] One interesting thing about the virus in the story was that it______.
选项
A、was especially weak
B、was similar to other viruses
C、could reproduce with great speed
D、had samples frozen and packed in dry ice
答案
C
解析
细节题型见第三段第二句:They found that by reproducing itself with very high speed,the virus had grown more than a million times within two days.(他们发现这种病毒以极快的速度繁殖,在两天之内它们已繁殖了一百万倍。)因此选项C为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3323968.html
相关试题推荐
Inlargehospitalsandresearchcenters,modemmethodsoftherapyseemtofocus
Thepremisesareasspick-and-spanasanyhealthcentre.Butunusuallyforso
InHongKong,doctorsreportedthat,forunclearreasons,12recoveredSARSpati
Thedoctorpreferredtoresignratherthanbeaccusedpubliclyofinfamouscondu
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000in
InHongKong,doctorsreportedthat,forunclearreasons,12recovered$ARSpati
In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusua
随机试题
Developingabadhabitiseasierthanmanymightthink."Youcanbecomeadd
TheAPPwillkeep________ofyourexercisesonitslog,andformapersonalhealt
Sheintendstomovethatthecommittee_____discussiononthisissue.A、suspends
Enoughsleepisimportanttohealth.The
关于性成熟期,哪项错误A.18岁左右开始,历时30年 B.卵巢功能成熟,已建立
运输非国家重点保护野生动物出县境的,应当持有狩猎、进出口等( )证明,以及检疫证
秽浊时邪与热毒相结的舌苔是A.白腻苔 B.黄腻苔 C.白如积粉 D.灰苔而
在适当的经济文化区域中,为有一定经济基础的客户提供一定范围内的金融定制服务,属于
根据保险法律制度的规定,以保险标的的保险价值是否先予确定为标准,保险合同可以划分
幼年期生长激素分泌过多会导致A.黏液性水肿 B.侏儒症 C.肢端肥大症 D
最新回复
(
0
)