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  3. Exercise is one of the few factors with a positive role in long term mainten

Exercise is one of the few factors with a positive role in long term mainten

游客2023-07-30  46
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. [br] "Even exercise professionals concede ’half a point here" (Sentence 2, Paragraph 2) means "they ______".
选项 A、agree that the calories in a small piece of pastry can be difficult to work off by exercise
B、partially believe diet plays a supporting role in weight reduction
C、are not fully convinced that dieting can help maintain one’s new weight
D、are not sufficiently informed of the positive role of exercise in losing weight
答案 D
解析 语义题。本题有一定难度。B)、C)两项比较容易排除，因为全文谈论的是锻炼的作用，而不是节食的作用。而选项A)似乎和原文第二自然段中第一句很相像，但原文中说“快步走上3英里才能消耗掉一块甜饼所含有的热量，所以有些人不愿意锻炼，觉得太慢、太累”，这并不意味着“一块小甜饼所含热量很难消耗掉”。所以A)不对。而选项D)“(他们)没有充分认识到锻炼在减肥中的积极作用”符合文章逻辑，因为正由于此，这些专业人士才会部分赞同“锻炼减肥太慢、太累”的观点。而此句也正好因与下一句意思相反而呼应下文．成为作者批驳错误观点，提出正确观点的前奏。
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