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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.
被这道题绕进去了，没怎么看懂，在herl解答前，从CD论坛上粘一个觉得自己比较信服的解答，in case还有人也错了
(A) 这句话的意思就是很少人减肥成功后会继续节食,就是之前提到的假设换了个写法.
(B) 不超重的人比超重的人新陈代谢容易改变".这个选项并不能告诉我们超重的人减肥成功后,为什么又胖回去了.原文中也没有提到任何关于新陈代谢改变的信息,原文只说不变.
(C) 一个人每天消耗的热量,更取决于当天摄入的热量而不是当下的体重。吃的少消耗就少，那这种关系无法导出减肥反弹不反弹
(D) 研究人员还没有决定是否超重人士的新陈代谢率可以被化学药物加速，和题目没有关系
(E) 因为新陈代谢是不变的,在正常重量的人增重和减肥一样难， 和题目无关
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