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标题: P2 42题请教大虾~ [打印本页]

作者: guanjusishui 时间: 2010-8-13 21:09
标题: P2 42题请教大虾~
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.

答案选A，A怎么感觉是重复了原文一样，怎么就成了假设呢？C为什么不对呢

作者: 2008115061 时间: 2010-8-13 23:49
这道题首先要搞清楚着这些胖子为什么会反弹体重。
这些人在减肥以后，和同等体重的正常人想比较，burn的卡路里较少，也就是消耗热量的功能比较差。但是，前提就是这些减肥者和正常人摄入的卡路里是一样的。
增肥=摄入-burn的卡路里。A选项，作者就是假设这些人在burn较少的前提下，不会相应摄入的也少，这样才能说明体重会在此增大。
文章的逻辑就是：消耗的少------》于是会增重。

仔细看看C 选项，首先这个amount是怎么被决定的和argument没有关系，因为事实就是burn的s少。over. 其次，如果考虑C选项，burn的数量和consume是正向关系？还是反项？这种涉及过分推理的选项不用去多想

作者: guanjusishui 时间: 2010-8-14 21:06

这道题首先要搞清楚着这些胖子为什么会反弹体重。
这些人在减肥以后，和同等体重的正常人想比较，burn的卡路里较少，也就是消耗热量的功能比较差。但是，前提就是这些减肥者和正常人摄入的卡路里是一样的。
增肥=摄入-burn的卡路里。A选项，作者就是假设这些人在burn较少的前提下，不会相应摄入的也少，这样才能说明体重会在此增大。
文章的逻辑就是：消耗的少------》于是会增重。

仔细看看C 选项，首先这个amount是怎么被决定的和argument没有关系，因为事实就是burn的s少。over. 其次，如果考虑C选项，burn的数量和consume是正向关系？还是反项？这种涉及过分推理的选项不用去多想

-- by 会员 2008115061 (2010/8/13 23:49:04)

I了了，谢谢指教

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