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  3. In the year 2000, the world is going to have a population of about 8 billion. Most scientists agree that the most severe problem

In the year 2000, the world is going to have a population of about 8 billion. Most scientists agree that the most severe problem

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问题     In the year 2000, the world is going to have a population of about 8 billion. Most scientists agree that the most severe problem is food supply.
    Who is going to feed all these people? Where is the food going to come from? Are we going to have enough food? Are we going to produce more artificial foods?
    One way of improving the situation is for people to eat less meat. Why? Because it takes 4 kilos of grain protein (蛋白质) to produce half a kilo of meat protein.Clearly, there is not going to be sufficient meat protein for 8 billion people. Therefore, it will also be necessary to change eating habits because meat is the main part of many people’s food today.
    A possible solution to this latter problem is the soybean (大豆). The soybean plant produces beans which have a very high fat and protein content. Scientists can now make these look and taste like real meat. They can also make many other artificial products such as soybean milk, for example, which has a taste of milk and can be used in cooking in very much the same ways as cow’s milk. In fact, one woman in the United States fed her family only on soybeans for a year! She gave them soybean beef, soybean chicken, soybean mi]k, and sometimes just soybeans. Possibly, we are all going to eat soybeans in the future and finally give up meat completely from our tables.
According to the passage, meat will completely disappear in the future because ______.
选项 A、people have to spend too much time and energy to produce it
B、too much grain protein is needed to produce it
C、it contains too much fat and protein
D、it is not good to the health
答案B
解析 本题为细节推断题。在第三段中提到“Because it takes 4 kilos of grain protein to produce half a kilo Of meat protein…Therefore，it will also be necessary to change eating habits…”(因为，制造 0.5 千克肉类蛋白质需要 4 千克谷物蛋白质……于是，也有必要改变饮食习惯……)第四段中提到 “The soybean plant produces beans which have a very high fat and protein content…Possibly，we are all going to eat soybeans in the future and finally give up meat completely from our tables．”(大豆的果实中脂肪和蛋白质含量都很高……也许，我们以后都要吃大豆，最终使肉类从我们的餐桌上消失。)由此可见，人们想用大豆代替肉，是因为大豆富含脂肪和蛋白质，而生产肉需要大量的植物蛋白质。
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