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Researchers have found that when very overweightpeople, who tend to have relatively low metabolic rates, lose weight primarilythrough dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewercalories at the new weight than do people whose weight is normally at thatlevel. Such newly thin persons will,therefore, ultimately regain weight until their body size again matches theirmetabolic rate. The conclusion of the argument above depends onwhich of the following assumptions?
(A)Relatively few very overweight people who have dieted down to a new weight tendto continue to consume substantially fewer calories than do people whose normalweight is at that level. (B) The metabolisms of people who are usually notoverweight are much more able to vary than the metabolisms of people who havebeen very overweight. (C) The amount of calories that a person usuallyburns in a day is determined more by the amount that is consumed that day thanby the current weight of the individual. (D) Researchers have not yet determined whetherthe metabolic rates of formerly very overweight individuals can be acceleratedby means of chemical agents. (E) Because of the constancy of their metabolicrates, people who are at their usual weight normally have as much difficultygaining weight as they do losing it.
答案最后是a， 但是a项取非后不应该是relatively many 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. 这跟原文的they will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level不是一样的吗 所以没有削弱啊＝ ＝好晕。。。求解答！ | 
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发表于 2013-10-6 21:53:16
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