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题库 / Prep2007E2-CR-42
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?
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.
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.
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.
Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
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.
P:当新陈代谢低的胖子通过节食减肥，这些人的新陈代谢率还是保持不变，因此他们比原本就瘦的人燃烧更低的卡路里-> C:这些新瘦子会逐渐增加体重，直到他们的体重再次和新陈代谢匹配上
assumption：choice a, 很少有减肥成功的新瘦子会继续吃很低的卡路里。correct
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