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  3. As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will

As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will

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问题     As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will begin to weaken. Your joints may become stiff. It may become more difficult for you to see and hear. The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury. In order to live longer, we have always tried to slow or stop this process that leads us toward the end of our lives.
    Many factors contribute to your health. A well-balanced diet plays an important role. The amount and type of exercise you get is another factor. Your living environment and the amount of stress you are under is yet another. But scientists studying senescence (衰老) want to know: Why do people grow old? They hope that by examining the aging process on a cellular level medical science may be able to extend the length of life.  
Which of the following is NOT mentioned as a factor contributing to one’s health?
选项 A、The right food you eat.
B、Lots of exercise you get.
C、Your living Conditions.
D、The amount of stress you are under.
答案B
解析 本题的关键是找到选项的信息在文章中出现的地方，也就是第二段的前半段。应该将每一个选项的内容与原文相对应。只有B选项的意思不同于原文中The amount and type of exercise you get is another factor. 这个句子的全部和确切含义，所以就可以确定B选项为正确选项。
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