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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.
减肥的胖子消耗的卡路里比普通正常人消耗的卡路里少。 所以，好不容易瘦下来的胖子最终会胖回去。 这里就有一个gap, 胖子消耗的卡路里小——胖子会又胖回去。 如果胖子每天一如既往吃很少，尽管他消耗的卡路里少，他也会保持减肥后瘦下去的那个体型。 但是，如果他消耗的卡里少，但他看自己瘦了，又恢复了之前的大吃特吃，本来消耗卡路里的能力就弱，再加上又可劲吃，肯定就会胖回去。
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