两道想破脑袋也想不通的逻辑题

frankpcboy

两道想破脑袋也想不通的逻辑题

1. In a study, shoppers who shopped in a grocery store without a shopping list and bought only items that were on sale for half price or less spent far more money on a comparable number of items than did shoppers in the same store who used a list and bought no sale items. which one of the following, if true, most helps to explain the apparent paradox in the study's results? A. only the shoppers who used a list used a shopping cart. B. the shoppers who did not use lists bought many unnecessary items. C. usually, only the most expensive items go on sale in grocery stores. D. the grocery store in the study carries many expansive items that few other grocery stores carry. E. the grocery store in the study places relatively few items on sale. 2. Recent studies have demonstrated that smokers are more likely than nonsmokers to develop heart disease. Other studies have established that smokers are more likely than others to drink caffeinated beverages. Therefore, even though drinking caffeinated beverages is not thought to be a cause of heart disease, there is a positive correlation between drinking caffeinated beverages and the development of heart disease. the argument's reasoning is most vulnerable to criticism on the grounds that the argument fails to take into account the possibility that A. smokers who drink caffeinated beverages are less likely to develop heart disease than smokers who do not drink caffeinated beverages. E. there is a common cause of both the development of heart disease and behaviors such as drinking caffeinated beverages and smoking. 各位大哥大姐们，这两道题我脑子晕乎了，怎么想也想不通了，第一题选C，第二题答案在A和E的其中一个，请赐教选哪个以及为什么另外一个错 谢谢各位！！！！！

chanelzr

第一题选C，因为原文指出：不列购物清单的消费者只购买对折或更低折扣的商品，但是在购买几乎同等数量商品的情况下，他们实际消费金额却远远高于列购物清单的消费者。那么原因只有一个，他们买的打折商品虽然打了折却还是比不打折的商品更贵，C刚好说明了这一点。

第二题如果只有这两个可以选的话，我选A。

lonelydark

第一题选C。答案必同时与sale list和money(price)相关，仅C项满足。不用再多做逻辑思考。
第二题选E。要想削弱两件事情间的因果关系中的correlation，引入两件事情共同的原因即可。

chanelzr

E肯定不对的。

GMATMASTER

Re: Q1: Agree with Chanel and Lonely.

Re: Q2: Agree with Chanel.

The conclusion is POSITIVE CORRELATION rather than causal relationship, as indicated by the argument: "drinking caffeinated beverages is not thought to be a cause of heart disease". A points out the possibility of NEGATIVE correlation between drinking caffeinated beverages and the development of heart disease. So A is correct.

色色莫再提

c, a
1的结论是花钱更多,而非买的更多, 所以B的数量多少与结论无关. 选c
2同意gmatmaster
两道题目的焦点都是关注结论

frankpcboy

是的，答案就是C,A


谢谢楼上各位！！！！


小弟茅塞顿开！！！！