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
9
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
[originaltext]Goodmorning.TodayI’dliketotalkaboutelectroniccigaret
设f(x,y)为连续函数,则等于:
排卵期下列哪一项是预测排卵的重要指标( )A.LH/FSH B.HPL C
张先生为儿子准备教育金,如果他的儿子还有10年上大学,假设届时大学每年学费为20
有机磷农药中毒出现烦躁、抽搐时,忌用的药物是A:地西泮 B:阿托品 C:吗啡
对保险合同利益有独立的请求权的是()。A:被保险人B:受益人C:代理人D:
胃十二指肠溃疡穿孔后最重要的临床表现是A.恶心、呕吐 B.突发的剧烈腹痛 C
下列选项中,关于财政收支行为的说法正确的有()。A.必须以法制性为基础 B.
某进口设备的离岸价为40万美元,到岸价为44万美元,人民币与美元的汇率为7.3:
下列反应中由细胞色素P450酶系催化的是A.单胺氧化 B.黄嘌呤氧化 C.S
最新回复
(
0
)