Some people say that the best way to reduce the body’s mid-section is to do stomach exercise. Many people believe that when spec

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问题      Some people say that the best way to reduce the body’s mid-section is to do stomach exercise. Many people believe that when specific muscles are exercised, the fatty tissues in the immediate area are "burned up". The truth is that exercise burns fat from all over the body and not from one specific area, no matter what kind of exercise.  Of course, if you reduce the fat throughout your body, you will certainly see results around your waist too.
    It is said that you need to exercise only twice a week in order to keep a sufficient level of physical fitness. Studies conducted by American scientists show that unexercised muscles lose their strength very quickly. After 48 to 72 hours, you must use the muscles again to reestablish the good physical effects. And what does that mean to you? American scientists concluded that while daily exercise is most helpful, every other day, three days a week will keep a sufficient level of physical fitness.
    Is it true that you burn more calories running one mile than walking the same distance? The answer is no. The truth is that you use the same amount of energy whether you walk or run the mile, since in both cases you are moving the same weight the same distance. The speed does not matter. Of course, if you run rather than walk for 30 minutes, you will cover more distance, and therefore burn more calories.
    If your breathing doesn’t return to normal within minutes after you finish exercising, you have exercised too much. Five minutes or so after exercising, your breathing should be normal, your heart shouldn’t be beating, and you shouldn’t be exhausted.
The third paragraph mainly tells us that ______.

选项 A、you will lose more weight running one mile than walking the same distance
B、you will use more energy walking one mile than running the same distance
C、for the same distance the faster you walk, the more energy you will use
D、whether you run one mile or walk the same distance, you use the same energy

答案D

解析 本题为段落主旨归纳题。第三段第二句“The troth is that you use the same amount of energy whether you walk or run the mile,since in both cases you are moving the same weight the same distance.”明确指出,无论你是走还是跑一英里,所消耗的能量是一样的,因为你只是在相等的距离内移动了同等重量的身体。
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