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  3. Have you eaten too much over the holidays? You should try fidgeting for a while. Those people around you might not like it, but

Have you eaten too much over the holidays? You should try fidgeting for a while. Those people around you might not like it, but

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问题    Have you eaten too much over the holidays? You should try fidgeting for a while. Those people around you might not like it, but scratching (moving your nails against a part of your body) and twitching (moving suddenly and quickly when you don’ t want to) are important ways of burning up calories.
   American researchers have found that some people’ s squirming(continuously turning your body when nervous) and wiggling (moving in small movements, especially from side to side) equal several miles of slow running each day.
   The scientists, basing the National Institute of Health’ s laboratory in Phoenix, Arizona, are studying why some people get fat and others stay slim.
   In one study, each of 177 people spent 24 hours in a room in the institute where the amount of energy was measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping (moving the front part of your feet up and down) , finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.
   The researchers have found that slim women fidget more than fat women, but there is no significant difference among men. Heavy people burn up more energy when they fidget than thin people do.
Scientists think a fidgeting habit to be______.
选项 A、a way to lose fat
B、a nervous habit annoying the people around
C、a better kind of exercise than slow running
D、a habit of thin people
答案A
解析 根据第一段最后一句“…scratching…and twitching…are important ways of burning up calories．”，第二段“…squirming…and wiggling…equal several miles of slow running each day．”和第四段第二句“…some people had burned up 800 calories in toe-tapping…finger-drumming…and other nervous habits．”可知，通过研究，科学家发现人在坐立不安时所做的习惯动作能够帮助消耗卡路里。由此可推知，科学家认为人在坐立不安时所做的一些习惯动作是一种减肥的方法。故选A。
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