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  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.
One may take certain vitamins when________.
选项 A、one wants to encourage the growth of a particular part of the body
B、one eats all kinds of food
C、one’s health is harmed by the lack of certain things which can be supplied by vitamins
D、one eats well and properly
答案C
解析 这是一道考察细节的题型。题干要求回答：一个人在什么时候会摄取适量的维他命?，文章第一段的最后一句“…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．”可推出答案为选项C。
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