lsat-15-2-21及mindfree的解答

mzyzhu · 发表于 2003-6-7 02:57:00

T15/S2/Q21. In response to high mortality in area hospitals, surgery was restricted to emergency procedures during a five-week period. Mortality in these hospitals was found to have fallen by nearly one-third during the period. The number of deaths rose again when elective surgery (surgery that can be postponed) was resumed. It can be concluded that, before the five--week period, the risks of elective surgery had been incurred unnecessarily often in the area.

Which one of the following, if true, most seriously undermines the conclusion above?

(A) The conditions for which elective surgery was performed would in the long run have been life-threatening, and surgery for them would have become riskier with time.
(C) Before the suspension of elective surgery, surgical operations were performed in area hospitals at a higher rate, per thousand residents of the area, than was usual elsewhere.

原文应该是，原来area hospital 既有emergency procedure又有elective surgery，结果由于high mortality, 决定停掉elective surgery 5周, 结果mortality rate 下降1/3。5周后elective surgery resume, mortality rate 上去了。

下面这句话看不太懂，有更好的翻译请指教：5周前elevtive surgery的风险被不适当的增加了频率？(我怎么看都觉得这句话别扭，特别是incurred unnecessarily often的这个often, 他在此时表示frequency这一概念吗？)

我觉得削弱应该是讲elective surgery 在5周以前并没有增加风险。但是我对A的了解好像总是不对：长期看，elective surgery实施的情况是致命的，而且越晚做越危险。

这句话是不是在表达这样一个意思：elective surgery (我的理解应该是类似切除癌细胞组织，心脏搭桥这一类手术，emergency surgery应该是枪伤，骨折一类的手术) 本来就比emergency surgery 要危险，而且越晚做越危险。因此否定了incurred unnecessarily often 这一结论。

以上是我自己的解答，当时并不知道已经有人问过词题并且mindfree已经给除了回答。这次花了2小时找到了答案，并贴出来，希望能被版主收到总结版中，有利后人。

以下是mindfree的解答：此题确实有难度,我一上来也是排除了A, 但是后来发现BCDE都不对, 回来又看A才选上.

C貌似正确答案, 但是它的问题是并没有给出两个阶段的不同. 原文是根据两段时间death rate的不同做的结论, C中并没有指出后来的情况.还有一个关键的问题是C并没有给出higher rate of surgery和death rate以及elective surgery之间的关系, 如果选C,那么你要自己做assumption,这在GMAT中是基本不允许的.

A虽然没有给出两个阶段的不同, 但是"long run"和"riskier with time"解释了death rate的变化,所以是正确答案.

再问一下，如果问题问的是加强，那么C是否能起到加强的作用。
烦请解释一下，谢谢。

mzyzhu · 发表于 2003-6-9 03:05:00

jacy · 发表于 2003-6-11 17:57:00

我认为加强, c也不对,
因为,c只是说明了一种客观状况:该地区的surgical operations 比其他地方做的更多.
而结论是: 由于emergency procedure导致了elective surgery的危险性不必要的增加了.
是emergency and elective surgey之间的关系.
而c的指出与其他地区的比较, 这种关系应该是无关的.
btw. the title should be lsat15 sec1 question21
not sec2.

mzyzhu · 发表于 2003-6-11 20:18:00

Jocy, thank you so much for for your coments... very appreciate...

the titile I quoted is the title in paper version rather than electrical version. So it is Section 2 instead of section 1.
我还没有想到你说的这种可能形: 由于emergency procedure导致了elective surgery的危险性不必要的增加了. 是emergency and elective surgey之间的关系

让我再想想。

jacy · 发表于 2003-6-11 21:36:00

或许你用的材料和我们的不同，但是这样会导致你找不到原先的帖子。
希望你下回再找帖子的时候小心一点，有可能TITLE虽然一样，但题目不同。

lsat-15-2-21及mindfree的解答

lsat-15-2-21及mindfree的解答

所属分类: GMAT考试

正在浏览此版块的会员 ()