填空题

Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.
British scientists may have discovered the reason why red wine appears to protect the heart. They say natural chemicals found in red wine appear to protect against 1 blood passages. The chemical 2 are called polyphenols (多酚). They come from the outer 3 of grapes. They are not present in other 4 drinks.
The scientists say their discovery 5 why many people in southern Europe can eat fatty foods and still have a low risk of heart disease. People in France, for example, have lower 6 of heart disease than Americans do. Yet the traditional French diet includes butter, cheese and other foods high in cholesterol.
This led the British scientists to examine another important part of the French diet red wine. Several earlier studies have suggested that people who drink 7 amounts of alcohol may reduce their risk of heart disease.
The British team experimented with cells from the blood 8 of cows. 9 . They found that polyphenols from all of the red wines stopped production of a protein called endothelin-1 (内皮缩血管肽-1). 10 , which is a cause of heart disease.
11 .