(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. 答案是E, 我想是不是因为文中提到'the steel thus produced earns more foreign exchange that it costs',就应该从'foreign exchange'上作答? 我开始选了D. 我觉得正因为以后的需求量会更大,现在才应该进口以保证储备为以后做准备。我不太懂OG上对D的解释'Choice D would support the policy only with assumptions about the reasons for the experts' prediction.' 谢谢NN们帮助!对于D,你们有什么更好的办法排除吗? 你做了2级引申,e是base在cost方面的直接支持,d只是单一的客观现象,并不能决定将来的行为。 |