快考了，急问：GWD-24-37 - ChaseDream

For the purpose of evaluating the argument, it would be most useful to know whether

A) more fish wholesalers are located within the city than in the surrounding suburbs.

B) any people who currently own seafood stores in the suburbs surrounding Eastville will relocate their businesses nearer to the city

D) fish has always cost about the same at seafood stores throughout Eastville and its surrounding suburbs.

E) Seafood stores within the city will in the future set prices that are lower than those at suburban seafood stores.

the referenced answer is E, however, i still have difficult in reasoning by this way. My choice is D.

虽然题目说了，buy fish from the same wholesalers and at the same price, 但是并没有说以后也是这样啊？（有点钻牛角尖）。可是觉得E也不对，因为既然taxbreak will substantially lower the cost of doing business within the city,就算seafood store within the city will set the prices lower or higher, profit margin 还是会高啊？profit margin = revenue - cost. cost 减少substantially，不管price/revenue高还是低，都会导致profit margin升高啊。

Conclusion是有关市内的profit margin高于郊区（因为new tax的影响），但如果像E说的市内store把价格下调，这样在成本一致的情况下，市内的profit margin未必高于郊区，反对了题干结论。

以下是引用mayli6在2005-9-27 23:21:00的发言：

24-37 Fish currently costs about the same at seafood stores throughout Eastville and its surrounding suburbs. Seafood stores buy fish from the same wholesalers and at the same prices, and other business expenses have also been about the same. But new tax breaks will substantially lower the cost of doing business within the city. Therefore, in the future, profit margins will be higher at seafood stores within the city than at suburban seafood stores.

For the purpose of evaluating the argument, it would be most useful to know whether

A) more fish wholesalers are located within the city than in the surrounding suburbs.

B) any people who currently own seafood stores in the suburbs surrounding Eastville will relocate their businesses nearer to the city

C) the wholesale price of fish is likely to fall in the future

D) fish has always cost about the same at seafood stores throughout Eastville and its surrounding suburbs.

E) Seafood stores within the city will in the future set prices that are lower than those at suburban seafood stores.

the referenced answer is E, however, i still have difficult in reasoning by this way. My choice is D.

虽然题目说了，buy fish from the same wholesalers and at the same price, 但是并没有说以后也是这样啊？（有点钻牛角尖）。可是觉得E也不对，因为既然taxbreak will substantially lower the cost of doing business within the city,就算seafood store within the city will set the prices lower or higher, profit margin 还是会高啊？profit margin = revenue - cost. cost 减少substantially，不管price/revenue高还是低，都会导致profit margin升高啊。

后天就考了，帮帮忙吧

按照你的公式profit margin = revenue - cost 应该是E更好些，因为在城里new tax breaks will substantially lower the cost of doing business，那么，Seafood stores within the city will in the future set prices that are lower than those at suburban seafood stores. 则可能使成本低的优势丧失，削弱结论；如果取非，显然支持结论。

当然，我觉得D似乎也有些道理。只是当按题目要求，选择For the purpose of evaluating the argument, it would be most useful to know whether 时，E更好。

以下是引用mayli6在2005-9-27 23:21:00的发言：

当然，我觉得D似乎也有些道理。只是当按题目要求，选择For the purpose of evaluating the argument, it would be most useful to know whether 时，E更好。

D虽然说到了same cost,但是没有考虑other costs，例如人工费呀什么的。在现实中应该要注意到这种可能性。

D说fish的cost在城内城外总是一样的，如果是重申原文，就没有起到什么作用顶多强调强调；如果是如楼主所说确定将来fish的cost不变，那么对于将来的其他费用的变化还是不得而知的，非有效most useful

E说城内price比城外price低了，那么在原文假定其他cost不变，而tax的cost大大降低的情况下，根据那个公式可以得到price 和cost都下降了，则哪个变化幅度大就决定了profit margin的增加或减少或不变，有效most useful...