题目
There are three main types of influenza virus. The most important of these are types A and B, each of them having several sub-groups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus group A, but he didn't know the sub-group. 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% of the population had become ill.
As soon as the London doctors received the package of throat samples, they began the standard tests. They found that by reproducing itself at very high speed, the virus had multiplied more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs used against all the known sub-groups of type A virus. None of them gave any protection. This then, was something new; a new influenza virus against which the people of the world had no ready help whatsoever.
Having isolated the virus they were working with, the doctors now conducted tests on some specially selected animals, which contracted influenza in the same way as human beings did. In a short time the usual sign of the disease disappeared. Theses experiments revealed that the new virus spread easily, but that it was not a killer. Scientists, like the general public, called it simply "Asian" flu.
The influenza discovered by a doctor in Singapore is caused by ______.
A.a new type of virus
B.type A virus
C.a sub-group of type B virus
D.a virus only existing in Asia
第1题
The doctor in Singapore performed a valuable service by ______.
A.finding the subgroup of the virus
B.developing a cure
C.keeping his patients apart from others
D.reporting the outbreak to Geneva
第2题
The doctor in Singapore performed a valuable service by______.
A.finding the subgroup of the virus
B.developing a cure
C.keeping his patients apart from others
D.reporting the outbreak to Geneva
第3题
The Singapore doctor found the influenza was caused by
A.an influenza virus type B.
B.a sub-group of virus type A.
C.a virus only existing in Asia.
D.a new type of influenza virus.
第4题
W.H.O. reported the influenza because ______.
A.the doctor belonged to that organization
B.many people in Hong Kong also suffered from it
C.the doctor found its virus and sent the samples to them
D.it spread widely in Singapore for the first time
第5题
W.H.O. reported the influenza because ______.
A. the doctor belonged to that organization
B. many people in Hong Kong also suffered from it
C. the doctor found its virus and sent the samples to them
D. it spread widely in Singapore for the first time
第6题
W. H. O, reported the influenza because
A.a doctor found its virus and reported to it.
B.many people in Hong Kong suffered from it.
C.it spread widely in Singapore for the first time.
D.the doctor belonged to that organization.
第7题
Who reported the influenza because ______.
A.the doctor belonged to that organization
B.many people in Hong Kong also suffered from it
C.the doctor found its virus and sent the samples to WHO
D.it spread widely in Singapore for the first time
第8题
There are three main types of the influenza virus. The most important of these are types A and B, each of them having several sub-groups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus group A, but he did not know the subgroup. He reported the outbreak to the World Health Organization in Geneva. W.H.O. published the important news alongside reports of a similar outbreak in Hong Kong, where about 15-20% of the population had become ill.
As soon as the London doctors received the package of throat samples, they began the standard tests. They found that by reproducing itself at very high speed, the virus had multiplied more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs used against all the known sub-groups of type A virus on this virus. None of them gave any protection. This then, Was something new: a new influenza virus against which the people of the world had no ready help whatsoever.
Having isolated the virus they were working with, the two doctors now conducted tests on some specially selected animals, which contact influenza in the same way as human beings do. In a short time the usual signs of the disease appeared. These experiments revealed that the new virus spread easily, but that it was not a killer. Scientists, like the general public, called it simply "Asian" flu.
The influenza discovered by a doctor in Singapore is caused by ______.
A.a new type of virus
B.type A virus
C.a sub-group of type B virus
D.a virus only existing in Asia
第9题
W. H. O. reported the influenza because
A.a doctor found its virus and reported to it.
B.many people in Hong Kong suffered from it.
C.it spread widely in Singapore for the first time.
D.the doctor belonged to that organization.
第10题
Passage One
In 1957 a doctor in Singapore noticed that hospitals were treating an unusual number of influenza-like (像流感的) cases. Influenza is sometimes called "flu” or a bad cold". He took samples from the throats of patients and in his hospital was able to find the virus (病毒) of this influenza.
There are three main types of the influenza virus. The most important of these are types A and B, each of them having several sub-groups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus group A, but he did not know the subgroup. He reported the outbreak to the World Health Organization in Geneva. W.H.O. published the important news alongside reports of a similar outbreak in Hong Kong, where about 15-20% of the population had become ill.
As soon as the London doctors received the package of throat samples, they began the standard tests. They found that by reproducing itself at very high speed, the virus had multiplied more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs used against all the known sub-groups of type A virus on this virus. None of them
gave any protection. This then, Was something new: a new influenza virus against which the people of the world had no ready help whatsoever.
Having isolated the virus they were working with, the two doctors now conducted tests on some specially selected animals, which contact influenza in the same way as human beings do. In a short time the usual signs of the iseaseappeared. These experiments revealed that the new virus spread easily, but that it was not a killer. Scientists, like the general public, called it simply "Asian" flu.
31. The influenza discovered by a doctor in Singapore is caused by ______.
A. a new type of virus
B. type A virus
C. a sub-group of type B virus
D. a virus only existing in Asia
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