1、A.to treat heart disease B. to reduce pain while one suffers from a heart attackC. to help old people to be more healthy D. to reduce the chance of a heart attack in old men2.Aspirin can help those who _.A work as doctors B. are under 40 years oldC. are fat and smoke cigarettes D. are older and heal
2、thy3.At last the researchers advised us to take aspirin _.A.with care B. as much as we like C. every day D. only considering the age4.From the experiment we can conclude that about _ of people who suffered from heart attacks without aspirin died.A. 7% B. 11% C. 19% D. 44%Passage 24It seems to be str
3、ange to you there is a blind spot （盲点）on the eyes. Here is an interesting experiment （实验） that can make something disappear, when one eye is open.Make a card about the size of a postcard and write two English letters L and R on it, L on the left and R on the right. First, hold the card about 80 cm a
4、way and you see both the letters. Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, youll find the letter L disappearing. But if you move the card nearer to your face, the letter will be seen again. Now do the same experimen
5、t with your left eye closed, youll find the letter R disappearing.Why does the letter disappear? It is because there is a blind spot on the eye. When the image （影像） of the letter falls on the blind spot, it wont be seen. That is why either of the letters disappears.1.The writer of the passage thinks
6、 that _ there is a blind spot on the eye.A. few people know B. no one knows C. most people know D. all the people know2. The word “disappear” in the passage means _ in Chinese.A. 驱散 B. 消散 C. 消失 D. 遗失3. You fail to see the letter L in the experiment because _.A. your eyes are poor B. its image falls
7、on the blind spotD. your left eye is not open C. you move it close to your eye4. In which order （顺序） should you do the experiment?Hold the card Move the card nearer Close your right eye Write two English letters Look at the letter R Make a cardA. B. C. D. 5. The passage mainly （主要） tells us _.A. how
8、 to find the blind spot B. an interesting experiment C. where the blind spot is D. there is blind spot on the eye Passage 25Different weather makes people feel different. It influences （影响） health, intelligence （智力） and feelings.In August, it is very hot and wet in the southern part of the United St
9、ates. People there have heart trouble and other kinds of health problems during this month. In the Northeast and the Middle West, it is very hot at some times and every cold at other times. People in these states have more heart trouble after the weather changes in February or March.The weather can
10、also influence intelligence. For example, in a 1983 report by scientists, IQ （智商） of a group students were very high when a very strong wind came, but after the strong wind, their IQ was 10% below. The wind can help people have more intelligence. Very hot weather, on the other hand （另一方面）, can make
11、it lower. Students in many schools of the United States often get worse on exams in the hot months of the year （July and August）. Weather also has a strong influence on peoples feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel unhappy dur
12、ing cold weather. But fat people may have a hard time in hot summer. At about 18C, people become stronger.Low air pressure （气压） may make people forgetful. People leave more bags on buses and in shops on low-pressure days. There are a “good weather” for word and health. People feel best at a temperat
13、ure of about 18 centigrade （摄氏度）.Are you feeling sad, tired, forgetful, or unhappy today? It may be the weathers problem.1._ can have a bad effect （作用） on health.A. Hot and wet weather B. Good weather C. Warm weather D. High intelligence2.People may have more intelligence when _ comes.A. a rain B. v
14、ery hot weather C. a strong wind D. low air pressure3.Low air pressure may make people _.A. forgetful B. sad C. angry D. tired4.In “good weather” of 18 centigrade, _.A. people are very forgetful B. people cant do their work wellC. thin people feel cold D. people are in better health5.The writer want
15、s to tell us that _.A.hot and cold weather influences all people in the same wayB.weather influences peoples lives C.IQ never changes during weather changesD.There is a good kind of weather for peoples work and healthPassage 26Now satellites are helping to forecast（预报）the weather. They are in space,
16、 and they can reach any part of the world. The satellites take pictures of the atmosphere （大气）, because this is where the weather forms （形成）. They send these pictures to the weather stations. So meteorologists （气象学家） can see the weather of any part of the world. From the pictures, the scientists can
17、 often say how the weather will change. Today, nearly five hundred weather stations in sixty countries receive satellite pictures.When they receive new pictures, the meteorologists compare them with earlier ones. Perhaps they may find that the clouds have changed during the last few hours. This may
18、mean that the weather on the ground may soon change, too. In their next weather forecast, the meteorologists can say this. So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24or 48 hours. Now they ca
19、n make good forecasts for three or five days. Soon, perhaps, they may be able to forecast the weather for a week or more ahead （提前）. 1.Satellites travel _. A. in space B. above space C. above the ground D. in the atmosphere 2.Why do we use the weather satellites to take pictures of the atmosphere？Be
20、cause _.A. clouds form there B. the weather forms there C. the weather satellites can do it easily D. the pictures can forecast the weather 3.Meteorologists forecast the weather _.A.without studying satellite pictures B. before they receive satellite pictures C. when they have received satellite pic
21、tures D. after they have compared the new satellite pictures with the earlier ones 4.Maybe well soon be able to forecast the weather for _.A. one day B. two days C. five days D. seven days or even longer 5.The main idea of this passage is that satellites are now used in _.A. taking pictures of the e
22、arth B. receiving pictures of the atmosphere C. weather forecasting D. doing other work in many ways Passage 27Paragraph 1Scientists have learned a lot about the kinds of people need. They say that there are several kinds of food that people should eat every day, they are: （1） green and yellow veget
23、ables of all kinds; （2） citrus （柑桔） fruits and tomatoes; （3） potatoes and other fruits and vegetables; 94） 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 2People in diffe
24、rent 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 time
25、s a day. Scientists say that none of the differences is really important. It doesnt matter whether foods are eaten raw or cooked, canned （罐装的） or frozen （冷冻的）. It doesnt matter if a person eats dinner at 4 oclock in the afternoon or at eleven oclock at night. The important thing is what you eat ever
26、y day.Paragraph 3There are two problems, then, in feeding the large number of people on the earth. The first is to find some way to feed the worlds 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（依据）the scientists，which of the following groups of food is the hea
