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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.
研究者发现胖人往往新陈代谢慢，靠节食减肥，他们的新陈代谢一般不变。因此他们减肥后仍比正常人燃烧更少卡路里。因此这些人最终还会增肥直到体重和新陈代谢率相当。
假设题
(A) 节食减肥后的人中很少人比正常人吃更少卡路里的食物；即多数减肥后的人不会节食，加上燃烧卡路里少，还会胖回去，取反可削弱，正确
(B) 不胖的人比胖人新陈代谢更容易变化；无关比较，排
(C) 谈每天燃烧的卡路里数量更取决于什么；无关比较，排
(D) 研究者不知是否靠化学物质能加速新陈代谢；化学物质，跳出范围，排
(E) 谈正常人如何；跳出讨论范围，排
1楼 | 2015-10-27 09:43:41 回复
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