2. 考研
  3. Today our knowledge of food and what it does for our bodies are far more advanced than that of the old times. Now we know about

Today our knowledge of food and what it does for our bodies are far more advanced than that of the old times. Now we know about

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问题     Today our knowledge of food and what it does for our bodies are far more advanced than that of the old times. Now we know about vitamins and how each kind of vitamin helps in the growth of a particular, the food that we eat will take care of our body and so there is no need to take any kinds of vitamins unless our doctor tells us that our bodies are short of something which can be supplied by them.
    Generally speaking, everything we eat does some good to our body. But if we eat too much of one kind of food and pay too little attention to others, we may have too much of one kind and not enough of others. Then we may be in trouble.
    We are often told that we must eat some meat at each meal in order to get the necessary proteins. That is only partly true, for proteins are not found only in meat. We can also get them from some vegetables.
    The best advice about what to eat is that we should eat all kinds of food but never too much of any.
The main idea of the second paragraph is that________.
选项 A、our health will be harmed if we eat everything
B、all kinds of food should be eaten to keep good balance
C、we should eat all kinds of food but not too little
D、we should eat more of some kinds of food than others
答案B
解析 这是一道考察推理的题型。题干要求总结文章第二段的主旨。选项A“如果我们什么都吃，这样是对我们的健康是有害的。”并没有提及到。选项B，“我们应该摄取各种食物以保持身体健康的平衡。”是正确的。选项C和D在文中有提及，但总结得不够全面。
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