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2道CR提,请教高手

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楼主
发表于 2003-7-31 23:09:00 | 只看该作者

2道CR提,请教高手

1. Lists of hospitals have been compiled showing which hospital have patient death rates exceeding the national average . The  date have been adjusted to  allow differences in the ages of patient.
问 each of the following , if true m provideces a good logical  ground  for hospitals to object to interpreting rank on  these lists as one of the indices of the  quality of hospital care except:
有3项我不明白的是
A。 hospitals that  keep patients longer are likely to have higher death  rates than those  that discharge patients earlier  but do not record deaths of patients at home  after  discharge.

B paients who are beray old on admission to a hospital are less likely  than younger patients to survive the same types of illness or surgical procedures.

C some hostitals  serve a  larger propertion of low income patients who tend to be more seriously ill when admitted to a hospital .

答案是B 但是为什么A不对呢? 好象C也对的样子

题2.  An electric power company gained greater profits and provided  electricity to consumers at lower rates per  unit of electricity by building larger  capacity more efficient within  its area,  to continue these financial  trends, the company  planned to replace  an old  plant by a plant  with triple  the capacity of its largest plant.

问The  company's  plan as described above  assumed  each of the following except:
A,demand for  electircity with  the company's area of service would  increase in  future.

B expenses would not rise  beyond  the level that   could  be compensated  for by  efficiency or volume of operation, or both.

C the planned plant would be sufficiently reliable  in sevice to contribute a net  financial benefit to the company as a whole.

D safety measures to be instituted for the new plant would be  the same as  those for  the plant it  would  replace.

E the tripiling  of capacity would not result in insuperable technological  obstacles to efficiency.
答案是 D 但是我觉得D也支持?因为如果safety measures to be instituted for the new plant would be  the same as  those for  the plant it  would  replace. 那不是间接说new plant可行了?
沙发
发表于 2003-8-1 10:01:00 | 只看该作者
1 找weaken.首先要知道作者的结论,还有作者的推理过程。
A 显然不是答案。A 提出一个理由。有些医院在某些情况下有可能比其他医院因为病人的不同产生更高的死亡率。所以不应该.......
C 和 A一样。
B 说的对一些病人怎么.....(对所有医院都是有如此的情况)。对结论 lists......有作用吗?(也就是最起码应该指出各个医院不同,才能weaken or strength 结论)
注意方法。
2 找假设的方法。对选项取反后如果导致结论不成立。那么就是假设。
D取反。xx 与 xx 不同。但xx有可能更优。结论不成立吗?




[此贴子已经被作者于2003-8-1 14:21:28编辑过]
板凳
发表于 2003-8-1 13:33:00 | 只看该作者
我还是不明白二楼的分析。既然题目说考虑到了年龄的因素,B应该不WEAKEN才对呀。
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