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39. “FDA” means Food and Drug Administration.
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38. It becomes more difficult to know the additives remain in processed food are harmful or helpful.
37. Nitrates are usually used for keeping the colour of food.
五、Reading ComprehensionDirections： Read the following passages and answer the questions. Passage 1: Food and HealthThe food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to the diet as well, especially cancer of the colon. Different cultures are more likely to develop certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates commonly used to preserve color in meats, and other food additives, accused cancer. Yet, these additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows, Sometimes similar dugs are administered to animals not for medicinal purposes, but for financial reasons, the farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.36. As a result of scientific intervention, some helpful substances have been purged from our food.
35. 面部组织 facial ______
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