one logic problem

jeffchai

Although the ratio of physicians to total population is about the same in the LACENAME>UnitedLACENAME> LACETYPE>StateLACETYPE> and Canada, the LACE>United StatesLACE> has 33 percent more surgeons per capita. Clearly, this 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 LACE>United StatesLACE> do not have a greater need for surgery than do patients in LACE>CanadaLACE>.

(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 surgeon.

(E)there are no unnecessary surgical operations performed in Canada.

I choose A but am not confident. Please help. Thanks

iceboy

我选E

其他朋友呢？

parkgong

E

eray008

E

填gap:33% more surgeon与40%more operation之间的gap

      只有当加拿大人不做无意义的手术时，才会出现美国人因内科医生多做手术

a的错误，我认识是need。因为need并不意味事实上的做手术，有need不见的会undergo

不知道到nn怎么认为。。。

lawyer_1

答案为A。关键理解A的意思：美国病人的手术没比加拿大大。取非，如果美国的手术需求大（即更大比例的人需要手术），那末医生多的原因就不是每个人人均的手术次数多。E错在unnecessary surgical operations 也是包括在原文结论的operations中。

[此贴子已经被作者于2005-8-5 4:37:20编辑过]

v22

lawyer，(A)patients in the LACE>United StatesLACE> do not have a greater need for surgery than do patients in LACE>Canada是说NEED，不是说手术大小问题，怎么能是assupmtion呢？指教LACE>

LACE>为什么不能选B？the population of the LACE>United StatesLACE> is not larger than that of LACE>CanadaLACE>. B取非，人口多，那么United States undergo 40 percent more operations per capita 就不成立，医生多了是因为人口多，不是因为每个人人均的手术次数多LACE>

这样A反而是削弱啊。。。。指教

lawyer_1

原文说的医生多是指per capita,所以和人口总数无关

v22

但是A明明说手术的NEED大，而不是说手术大

lawyer_1

A的意思是说，在美国，不是更多比例的人需要手术。

[此贴子已经被作者于2005-8-5 1:17:34编辑过]

ESeraph

我认为E并没有指出美国是否也存在 unnecessary surgical operations。 这样就无法比较了。所以是有问题的