求大神指教！！！已经快晕死了

richygogogo

Country Y uses its scarce foreign-exchange reserves to buy scrap iron for recycling into steel.  Although the steel thus produced earns more foreign exchange than it costs, that policy is foolish.  Country Y's own territory has vast deprosits of iron ore, which can be mined with minimal expenditure of foreign exchange.

Which of the folling, if true, provides the strongest support for Country Y's policy of buying scrap iron abroad?

(a) The price of scrap iron on international martkets rose significantly in 1987.

(b) Country Y's foreign-exchange reserves dropped significantlly in 1987.

(c) There is virtually no difference in quality between steel produced from scrap iron and that produced from iron ore.

(d) Scrap iron is now used in the production of roughly half the steel used in the world today, and experts predict that scrap iron will be used even more extensively in the future.

(e) Furnaces that process scrap iron can be built and operated in Country Y with substantially less foreign exchange than can furnaces that process iron ore.  

这道题我选对了，正确答案是E，但是我对C,D选项不是很理解。C选项说两种方法制造出来的steel质量没有差别，那不就是说明使用scrap iron是没有什么质量问题的嘛，那不就加强了结论吗？D选项既然scrap iron有着广泛的应用，那你用scrap iron制造steel不是更好吗？求大神指教我思路哪里错了，C,D错在哪里了！！！！

richygogogo

自己顶一下，哪位大牛帮忙解答一下

VincentFSJ

argument说：Y想进口scrap iron来做steel再转卖赚取外汇，但是自家的ore挖起来很便宜，所以政府的措施不好
要求证明进口iron来加工steel更划算。
既然是成本，脑补一下：就是scrap iron——steel 赚更多比ore——steel
C:生成的steel质量一样，没有关系吧？（有一点点是在支持用ore更好的意思）
D：世界很多地方在用scrap iron，以后更加普及。也完全没有关系吧？和赚取利润和成本有什么关系吗？
那么只有E才给出了用SCRAP IRON比ore更划算的原因就是，虽然开采ore便宜，但是加工成steel花得多，贵于用scrap iron