問題詳情

The struggle to save the food supply from damage did not end with Silent Spring. 11 For example, in orderto increase the protein in cattle, people began to alter the diet of cows. Cows do not eat meat in their naturalsurroundings, but farm industries in many countries began feeding cows the ground-up parts of deadsheep. 12 According to them, this harmful process, begun by humans for greater profits, led to outbreaks of“mad cow disease” in the United States. This was a misfortune for the beef industry. Farmers also often feed largeamounts of antibiotics and hormones to their animals to make them stronger. 13 This is harmful to us all becausehuman diseases are becoming less responsive to antibiotics, and the hormones are not good for children. Recently, foodmanufacturers in the United States have developed a new method of irradiating food to kill bacteria. 14 Thedangers to the food supply depicted by the environmental movement have led many people to buy only naturalproducts from organic farms, which do not use chemical pesticides. 15 People in many countries are puzzledabout how to carry on the legacy of being responsible for the environment, which is the message of Silent Spring.
11
(A)Many scientists believe that some cows’ nervous systems were stricken by a sheep disease called scrapie.
(B)The need to maintain a prosperous agricultural economy has led to many difficulties.
(C)Many people want to ban irradiated food because they are not sure such food is safe.
(D)But organic foods are expensive and hard to find.

參考答案

答案：B
難度：適中0.547297
統計：A(22),B(81),C(33),D(9),E(0)

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