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求助一道题!!1

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楼主
发表于 2003-10-27 17:48:00 | 只看该作者

求助一道题!!1

求助高手一道题!!!!!!
Although the ratio of physicians to total population is about the same in the United States and Canada, the United is the reason people in the United States undergo 40 percent more operations per capita than do Canadians.
The explanation given above rests on an assumption that:
A). patients in the United States do not have a greater need for surgery than do patients in Canada
B). the population of the United States is not larger than that of Canada
C).United States patients sometimes travel to Canada for certain kinds of surgery
D).general practitioners in the United States do not as a rule examine a patient who is a candidate for surgery before sending the patient to a surgery
E). there are no unnecessary surgical operations performed in Canada
想不通
沙发
发表于 2003-10-27 18:37:00 | 只看该作者
题目不全
板凳
发表于 2003-10-27 19:13:00 | 只看该作者
可排除A,B,C, 答案在D,E选。

个人认为D更好!

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