【单选题】
There are three main types of the influenza virus. The most important of these are typeA、andB, each of them having several subgroups. With the instruments at the hospital, the doctor recognized that the outbreak was due to a virus in groupA, 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 typeA、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 simplyAsian flu.
The first discovery of the virus, however, was made inChina before the disease had appeared in other countries. Various reports showed that the influenza outbreak started inChina, probably in February 1957.By the middle March it had spread all overChinA、The virus was found byChinese doctors early in March.ButChina is not a member of the WHO and therefore does not report outbreaks of disease to it. Not until two months later, when travelers carded 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、
B．could not be cured by any known drug
C．could be prevented from spreading
D．could not affect adults
网考网参考答案：B
网考网解析：
[分析] 细节题型 见第三段第三至五句：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. (这些医生们继续他们细致的测试后发现所有已知对A类病毒的附属亚病毒有疗效的药物对此种病毒均无效；因此这种病毒是种新型的流感病毒，世上还无药物能对人类抵抗这种病毒有所帮助)；因此B为答案。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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