- UID
- 546928
- 在线时间
- 小时
- 注册时间
- 2010-7-16
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
Although the ratio of physicians to total population is about the same in the U.S. and Canada, the U.S. has 33% more surgeons per capita. Clearly, this is the reason people in the US undergo 40% more operations per capita than do Canada. the explanation given above rests on an assumpyion that: a)patients in the US do not have a greater need for surgery than do patients in Canada. b)the population of US is not larger the that of Canada. c)US patients sometimes travel to Canada for certain kinds of surgery. d)general practitioners in US do not as a rule examine a patient who is a candidate for surgery before sending the patient to a surgeon. e)there are no unnecessary surgical operations performed in Canada.
这个题我最后留下了A B两项。 但后来想想,觉得都不太有道理。
原文中说,美加医生的比例是一样的,但美国比加拿大多了33%的外科医生,所以美国人比加国人多承受40%的手术比例。
问,题目中的一个assumption是什么。
那么有那么多的外科医生,不一定所有的病人都需要动手术。 所以,这里的假设是“如果美国的病人对手术的需求比加国多,那么结论才成立”
A,选项说,美国的病人不需要那么多的手术,相比加国人。 是对原文中的推论削弱啊。如果是patients in the us do not have less need for surgery than do patients in canada. 才对吧。
B, 选项说,米果的总人口比加国的少。感觉这个对吧。
是这样的吗????
谢谢各位了。
|
|