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1、北达教育旗下北京中考网 010-62754468北达教育旗下北京中考网 010-62754468Section III 科学小品篇科学小品篇 Passage 23Researchers (研究者) have announced (宣布) the result of two studies on the health effects of the drug aspirin (阿斯匹林). One study shows aspirin can sharply reduce the chance that a healthy, older man will suffer from a hear
2、t attack (心脏病).The study offered two new results from earlier findings. It said taking one aspirin pill every other day helped only healthy men over the age of fifty. It also said aspirin gave the greatest protection against heart attacks to men with low blood cholesterol (胆固醇) levels.Earlier in the
3、 United States began a major aspirin study in the early 1980s. It included 22,000 healthy men doctors. All were between the ages of forty and eighty-four. More than 11,000 of the doctors took a harmless pill that contained no drug. The men did not know which kind of pill they were taking.The doctors
4、 who took aspirin suffered 44% fewer heart attacks than those taking the harmless pill. 139 men who took aspirin suffered from heart attacks. Ten of them died. 239 men who did not take aspirin suffered from heart attacks. Twenty-six of them died.The researchers said the doctors study provides clear
5、proof that taking aspirin can prevent a first heart attack in healthy, older men. They said, however, the result does not mean every man over the age of fifty should take aspirin. They said aspirin couldnt help men who do not eat healthy foods, who smoke cigarettes and who are fat. The researchers s
6、aid men who think they would be helped by taking aspirin should talk with their doctors first.1.The passage tells us that the new use of aspirin is _.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
7、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 healthy3.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 experim
8、ent 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 strange 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
9、 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 away 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 tow
10、ards 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 experiment 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
11、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 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 know北达教育旗下北京中考网 010-62754468北达教育旗下北
12、京中考网 010-627544682. 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 on the blind spotD. your left eye is not open C. you move it close to your eye4. In which order (顺序)
13、 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 to find the blind spot B. an interesting experiment C. where the blind spot is D. there is blind sp
14、ot 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 States. People there have heart trouble and other kinds of health problems during this month. In the N
15、ortheast 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 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 it lower. Students in many schools of the United States often get worse on exams in the hot mo
