Passage 23

　　Researchers (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 heart 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 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 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 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 couldn’t help men who do not eat healthy foods, who smoke cigarettes and who are fat. The researchers said 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 attack

　　C. to help old people to be more healthy 　D. to reduce the chance of a heart attack in old men

　　2.Aspirin can help those who ______.

　　A work as doctors                B. are under 40 years old

　　C. are fat and smoke cigarettes    D. are older and healthy

　　3.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 age

　　4.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 24

　　It 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 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 towards you, you’ll 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, you’ll 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 won’t 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

　　2. 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 spot

　　D. your left eye is not open C. you move it close to your eye

　　4. In which order (顺序) should you do the experiment?

　　①Hold the card ②Move the card nearer ③Close your right eye

　　④Write two English letters ⑤Look at the letter R ⑥Make a card

　　A. ④⑥①②③⑤ B. ①③⑥④⑤② C. ⑥①④③②⑤ D. ⑥④①③⑤②

　　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 spot on the eye