求助 Prep1—124

HeavenlyAres

Which of the following most logically completes the argument?  





Researchers recently asked dozens of shoppers, chosen at random coming out of a FoodBasket supermarket, what they had purchased.  The prices of the very same items at the nearest ShopperKing supermarket were totaled and compared with the FoodBasket total.  The ShopperKing totals averaged five percent higher than the FoodBasket totals.  Nevertheless, this result does not necessarily show that shoppers at ShopperKing would save money overall by shopping at FoodBasket instead, since __________.  





A. shoppers who shop regularly at a given supermarket generally choose that store for the low prices offered on the items that they purchase most often  





B. for shoppers with more than 20 items, the ShopperKing totals averaged more than five percent higher than the FoodBasket totals  





C. many shoppers consider factors other than price in choosing the supermarket at which they shop most regularly  





D. there is little variation from month to month in the overall quantity of purchases made at supermarkets by a given shopper  





E. none of the people who conducted the research were employees of the FoodBasket supermarket

为什么答案是A。。。我觉得是选C啊。题目的逻辑难道不是说ShopperKing的营业收入总额大于FoodBasket，因此S的价格比F便宜，然后让我们给出逻辑削弱吗？

dengyichao

原因是，相同商品在S的商品价格总和比F少，结论是顾客在S购物比F省钱
关键在于怎么从“商品价格总和少”推出“省钱”
如果顾客都不考虑价格因素，那怎么会受到“商品价格总和少”这个因素的影响呢
A说顾客会选择他们常买的商品价格较低的超市，也是说就算所有相同商品的价格总和的确是S比F少，当不代表去S购物就一定省钱，或者顾客常买的东西反而在F更便宜呢

HeavenlyAres

原因是，相同商品在S的商品价格总和比F少，结论是顾客在S购物比F省钱
关键在于怎么从“商品价格总和少”推出“省钱”
如果顾客都不考虑价格因素，那怎么会受到“商品价格总和少”这个因素的影响呢
A说顾客会选择他们常买的商品价格较低的超市，也是说就算所有相同商品的价格总和的确是S比F少，当不代表去S购物就一定省钱，或者顾客常买的东西反而在F更便宜呢

-- by 会员 dengyichao (2009/11/6 23:27:57)

先谢谢你的答复。不过我有点迷糊了。

“The prices were totaled and compared”.  The ShopperKing totals averaged five percent higher than the FoodBasket totals.

这个意思不是说S的价格要大于F么。为什么1楼说的是反的呢。。。

dengyichao

对不起，我给整岔了。。。。
虽然S的平均商品价格比F高了5%,但并不代表在S购物的顾客得改到F买东西才能省钱，因为可能对有些顾客来说，他们常买的一些东西在S比在F买要便宜