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  3. Exercise is one of the few factors with a positive role in long term maintenance of body weight. Unfortunately, that message has

Exercise is one of the few factors with a positive role in long term maintenance of body weight. Unfortunately, that message has

admin2010-02-20  74
问题     Exercise is one of the few factors with a positive role in long term maintenance of body weight. Unfortunately, that message has not gotten through to the average American, who would rather try switching to "light" beer and lowcalorie bread than increase physical exertion. The Centers for Disease Control, for example, found that fewer than onefourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet.
    In rejecting exercise, some people may be discouraged too much by caloricexpenditure charts; for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry(小甜饼). Even exercise professionals concede half a point here. "Exercise by itself is a very tough way to lose weight," says York Onnen, program director of the President’s Council on Physical Fitness and Sports.
    Still, exercise’s supporting role in weight reduction is vital. A study at the Boston University Medical Center of overweight police officers and other public employees confirmed that those who dieted without exercise regained almost all their old weight, while those who worked exercise into their daily routine maintained their new weight.
    If you have been sedentary (极少活动的) and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily. In a year’s time, assuming no increase in food intake, you could lose ten pounds. By increasing the distance of your walks gradually and making other dietary adjustments, you may lose even more weight.
Some people dislike exercise because ______.
选项 A、they think it is physically exhausting
B、they find it hard to exercise while on a diet
C、they don’t think it possible to walk 3 miles every day
D、they find consulting caloricexpenditure charts troublesome
答案A
解析 细节推论题。这一题对应于原文的第二自然段第一句“... some people may be discouraged too much by caloricexpenditure charts; for example...”。这一句说明，这些人对热量消耗表感到沮丧的原因是他们觉得锻炼消耗热量的过程太慢、太累，而不是查询热量支出表很麻烦，所以选项D)是对此句的曲解；而选项A)则正好反映了此句的内容。对于 B)和C)，文中根本未提及。所以应选A)。
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