og10-165疑问

天蝎蝴蝶

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 deposits of iron ore, which can be mined with minimal expenditure of foreign exchange.

 

Which of the following, if true, provides the strongest support for Country Y’s policy of buying scrap iron broad?

 

(A) The price of scrap iron on international markets rose significantly in 1987.

(B) Country Y’s foreign-exchange reserves dropped significantly 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)

(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.

答案是 E 可我觉得C对啊 只有相同才有可比性啊 ？ 还有E为什么对呢？谢谢各位啦 ！

 

xfi883

原文大意——

Y国用外币购买铁定生产钢铁，而后卖掉换去更多外币。这种做法愚蠢，因为Y国可以开发自己的铁矿，而不用外币去买铁定。

读完题后，就知道，本题关键在于，Y国为什么不去开发自己的铁定。

E恰好说出了原因：开发成本比直接购买成本高。所以正确。

C说，用买来铁定和自己开发的铁定生产出来的钢质量差不多。无关。

请支持调大字号的建议，谢谢。

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=394734&replyID=&skin=1

温带植物

scrap iron 指用外币去回收剩余铁，比如外国人的报废车 （假设含的都是铁，我不清楚什么样的废品几乎都是铁材料组成：榔头？!），此类原料运回国后重新融化铸成钢。所以，这道题必选 E.

E 翻译过来就说：加工残钢的熔炉用外汇买进来比加工本国开采铁矿石的熔炉要"substantially" less expensive,即成本便宜很多。

我们可以清楚这道题的逻辑试图告诉你：总成本 = 矿石成本 + 熔炉成本

国内开采铁矿 虽然不需用到外汇，但是开发成本未知（题目未交代）plus 熔炉成本过高-------此方案不被采纳的原因
而虽然动用了外汇购买，但是残铁价格本不高 （合理推测，应小于开矿成本），Plus熔炉很便宜-------最优方案
所以，看似矛盾，实则非常合理 E is the optimal one

温带植物

C无关的主要原因 quality 相同否不是讨论的焦点。

注意题中多处出现cost 对比，所以c 其实非常容易排除

天蝎蝴蝶

谢谢楼上各位，明白了！