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

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

admin2010-02-20  89
问题 Exercise is one of the few factors with a positive role in longterm 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 calorieexpenditure charts, for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry. Even exercise professionals concede half a point here. "Exercise by itself is a very tough way to lose weight." said 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.

What is said about the average American in the passage?
选项 A、They tend to exaggerate the healthful effect of "light" beer.
B、They usually ignore the effect of exercise on losing weight.
C、They prefer "light" beer and lowcalorie bread to other drinks and food.
D、They know the factors that play a positive role in keeping down body weight.
答案B
解析 细节题。依据在文章第一段第二句话“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．”遗憾的是，普通美国人并未懂得这个道理，他们宁可尝试着改喝“淡”啤酒和吃低热面包而不愿增加消耗体力的运动。因此，我们可以确定答案为B。
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