2. 外语
  3. The food we eat seems to have profound effects on our health．Although science has made enormous steps in making food more fit to

The food we eat seems to have profound effects on our health．Although science has made enormous steps in making food more fit to

admin2011-02-07  74
问题     The 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 80% of cancer is related to the diet as well. Different cultures are more prone to contract certain illnesses because of the food that is characteristic in these cultures. That food related to illness is not a new discovery. In 1945, government researchers realized that nitrates(硝酸盐)and nitrites(亚硝酸盐), commonly used to preserve colour in meat, and other food additives, caused cancer. Yet, these carcinogenic(致癌的)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(青霉素)to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs 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.
The word"this"in the second sentence ofparagraph 2 most probably refers to______.
选项 A、farmers
B、penicillin
C、beef and poultry
D、the fact that farmers often give penicillin to beef
答案D
解析 文中第二段提到“Farmers of ten give penicillin to beef and poultry, and because of this”，根据题意应该选D。
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