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In 1957 a doctor in Singapore noticed that hospitals were treating an unusual number of influenzalike 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(病毒)of this influenza.
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(亚群). At the hospital the doctor recognized that the outbreak was because of a virus group A, but he did not know the sub-group. He reported the outbreak to the World Health Organization in Geneva. W. H. O. published the important news together with reports of the same kind of 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 to test them. They found that they could reproduce themselves at a very high speed. Continuing their careful tests, the doctor checked the effect of medicine used against all the known sub-groups of type A virus. On this virus, none of them was of any use.
Having separated the virus, the two doctors now made tests on some selected seleceted animals. In a short time the usual signs of the disease appeared. These experiments showed that the new virus spread easily, but that it was not a killer. Scientists, like the general public, called it simply “Asian flu”.
The Asian flu mentioned in the passage ____. [ ]
A. had something to do with a virus group B
B. was reported to W. H. O in Geneva by a doctor in Hong Kong
C. broke out not only in Singapore but also in Hong Kong
D. was taken from the throats of the patients in a hospital in Singapore
London doctors considered ____. [ ]
A. Asian flu as a bad cold
B. there were three main types of influenza
C. it was necessary to test the other groups of virus besides group A
D. the influenza called “Asian flu”a new one
The Singapore doctor helped the world by ____. [ ]
A. making those with Asian flu well again
B. killing the virus that caused Asian flu
C. finding the sub-group of the virus
D. reporting the outbreak of Geneva
The Asian flu virus ____. [ ]
A. was a killer
B. was very weak
C. could reproduce very quickly
D. died very fast
查看习题详情和答案>>Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds; (2)citrus (柑橘)fruits and tomatoes; (3) potatoes and other fruits and vegetables ; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal (谷物), rice is also in this kind of foods; (7) Butter or something like butter.
People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned or frozen. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.
There are two problems, then, in feeding the large number of people on earth. The first thin g is to find some ways to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kind of food to make them grow to be strong and healthy.
According to the scientists, which of the following groups of food is the healthiest for your lunch?
A. chicken, apples, cereal, cabbages. B. potatoes, carrots, rice, bread.
C. oranges, bananas, fish, tomatoes. D. beef, pork, fish, milk
It is important for people to eat __________.
A. three times a day B. dinner at twelve o’clock
C. cooked food all the day
D. something from each of the seven kinds of food every day.
People in different countries and different places of the world________________.
A. have the right kinds of food to eat B. cook their food in the same way
C. have their meals at the same time D. eat food in different ways.
Which of the following is NOT true?
A. People in some places don’t have enough to eat.
B. There are too many people in the world.
C. One of the problems is that no one is hungry.
D. The scientists are trying to make people e grow to be strong and healthy.
If there is paragraph 4, what do you think is going to be talked about?
A. When people eat their lunch. B. What to do with the two problems.
C. How to cook food in different ways. D. Why people eat different kinds of food.
查看习题详情和答案>>Paragraph 1
Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds. (2) citrus(柑桔) fruits and tomatoes; (3) potatoes and other fruits and vegetables; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal(谷类), rice is also in this kind of food; (7) butter, or something like butter.
Paragraph 2
People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned or frozen. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.
Paragraph 3
There are two problems, then, in feeding the large number of people on earth. The first is to find some ways to feed the world’s population so that no one is hungry.The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy.
1.According to the scientists, which of the following groups of food is the healthiest for your lunch?
A. chicken, apples, cereal, cabbages B. potatoes, carrots, rice, bread
C. oranges, bananas, fish, tomatoes D. beef, pork, fish, milk
2.It is important for people to eat _______.
A. three times a day B. dinner at twelve o’clock
C. cooked food all the day D. something from each of the seven kinds of food every day
3.People in different countries and different places of the world _______.
A. has the right kinds of food to eat B. cooks their food in the same way
C. has their meals at the same time D. eat food in different ways
4.If there is Paragraph 4, what do you think is going to be talked about?
A. When people eat their lunch B. What to do with the two problems
C. How to cook food in different ways D. Why people eat different kinds of food
查看习题详情和答案>>
The a 【小题1】 of scientists towards the rise is completely different. On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be a 【小题2】 (大灾难). On the other hand, George Hambley, who is o 【小题3】 to this view, predicts that any warming will be 【小题4】 (温和的) with few bad environmental c 【小题5】 .
查看习题详情和答案>>Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds; (2)citrus (柑橘)fruits and tomatoes; (3) potatoes and other fruits and vegetables ; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal (谷物), rice is also in this kind of foods; (7) Butter or something like butter.
People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned or frozen. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.
There are two problems, then, in feeding the large number of people on earth. The first thin g is to find some ways to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kind of food to make them grow to be strong and healthy.
【小题1】 According to the scientists, which of the following groups of food is the healthiest for your lunch?
A.chicken, apples, cereal, cabbages. | B.potatoes, carrots, rice, bread. |
C.oranges, bananas, fish, tomatoes. | D.beef, pork, fish, milk |
A.three times a day | B.dinner at twelve o’clock |
C.cooked food all the day | |
D.something from each of the seven kinds of food every day. |
A.have the right kinds of food to eat | B.cook their food in the same way |
C.have their meals at the same time | D.eat food in different ways. |
A.People in some places don’t have enough to eat. |
B.There are too many people in the world. |
C.One of the problems is that no one is hungry. |
D.The scientists are trying to make people e grow to be strong and healthy. |
A.When people eat their lunch. | B.What to do with the two problems. |
C.How to cook food in different ways. | D.Why people eat different kinds of food. |