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Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.The conclusion of the argument above depends on which of the following assumptions?
(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.
(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.
(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.
Ans: a
I am a little confused by this question. For my understanding, "burn significantly fewer calories" means "消耗较少的calories", which definitly regain weight.
For choice (a), "consume substantially fewer calories" that means "dieting" or "消费更少的calories".
In the previous discussion, http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=28139
Light suggested A选项取非验证，亦即，很多超重的人在减重成功之后，会持续节食，消耗较少的calories.→所以他们不会复胖 ，与conclusion矛盾→亦即，若选项A不存在，则此conclusion也不存在，所以选项A为此题的必要assumption.
Should be "消耗较少的calories.→所以他们会复胖"?
有点小错误, 消耗较少的calories, ----->应该是消耗更多的calories 吧
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发表于 2004-7-11 03:59:00
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