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.
(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. 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) 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. "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) 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. "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".一个十分模糊不清的选项,"more determined to what extent?",权重比例具体是多少?51%:49%? 99%:1%?这叫我如何判断是好?如果把more去掉,只说"消耗的热量取决于当天摄入热量"还会更清楚点,但即使如此,逻辑上也有矛盾.如果成正比,摄入热量越少,消耗越少,那超重的人是如何节食减肥下来的?如果是反比,那节食减肥就是荒谬的,因为吃得越少,消耗得越多.我如果要减肥,那一天一顿满汉全席差不多. (D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents. "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"和原文没有关系,从头到尾没提吃药的事.
(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. "因为新陈代谢是不变的,普通重量的人相比节食的人更难增重".我们讨论的是节食的人怎么胖回去的,没有考虑普通人增重的问题.作者: dragondragon 时间: 2011-11-5 11:56
谢谢orangemoo ，隔几天再来看这题，通过你的解释，有点明白了。作者: Cateran 时间: 2011-12-6 15:51
十分感谢作者: TS28 时间: 2012-5-18 11:06
我现在最缺的就是#3那个看选项前的思路！终于搞懂了！作者: jaggie 时间: 2013-4-10 10:32
