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求一篇英语阅读理解 开头是In the United States,第一段讲的是美国人生下来穷的,通过自己的努力

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求一篇英语阅读理解 开头是In the United States,第一段讲的是美国人生下来穷的,通过自己的努力
成为成功者,被人尊敬,下几段有竞争,自由贸易,第三国家,之类的词,求.
求一篇英语阅读理解 开头是In the United States,第一段讲的是美国人生下来穷的,通过自己的努力
原文:
In the United States,30 percent of the adult population has a"weight problem.Some people think the reason is clear-----they eat too much. But the scientific evidence does little to support this idea. Going back to the America of 1910. We can find that people were thinner than today, but they ate more food than us. In those days people worked harder, walked more ,used machines less and didn't watch TV.
Several modern studies ,such as a study of 3545 London office workers in 1979, report that fat people eat less than thin people .
Studies show that thin people are more active than fat people. A study by a group a t stanford University found the following interesting fact:
The more the men run , the more their body fat lost.
The more they run , the more food they need.
Those who run the most eat the more, and lose the most body fat.