172. There is a great deal of geographical variation in the frequency of many surgical procedures—up to tenfold variation per hundred thousand people between different areas in the numbers of hysterectomies, prostatectomies, and tonsillectomies.
To support a conclusion that much of the variation is due to unnecessary surgical procedures, it would be most important to establish which of the following?
(A)A local board of review at each hospital examines the records of every operation to determine whether the surgical procedure was necessary.
(B)The variation is unrelated to factors (other than the surgical procedures themselves) that influence the incidence of diseases for which surgery might be considerer.
(C)There are several categories of surgical procedure (other than hysterectomies, prostatectomies, and tonsillectomies) that are often performed unnecessarily.
这是一道weaken 题 还是support 题，没看懂，答案是哪一个，为什么
173.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.
(A)中的Relatively few 不是否定么？？
[em22][em22]作者: tongxun 时间: 2002-6-15 10:07
172、本题为支持题型。全文的线索是：（由上到下）手术率有地区差异（现象）----此差异是由不必要的手术导致的（结论）-----下面哪个加上现象能支持结论。
A、无关或有些削弱的意思。原因：1）委员会监督作用有多大相关性？2）有委员会就会避免一写不必要的手术
B、正确答案。我肯定。选项中用的是other than the surgical procedures themselves。排除了其他因素的影响，就是不必要的手术
C、other than hysterectomies, prostatectomies, and tonsillectomies。竟然将讨论的例证给毁了，能对吗？作者: tongxun 时间: 2002-6-15 10:10
A)中的Relatively few 不是否定么？？
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是啊！正是因为胖人又吃，吃肥了啊！作者: Rocli 时间: 2002-6-15 12:35
呵呵，看了版主的回答，如醍醐灌顶，谢谢
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