※ 引述《heystranger (卍旷世巨鲁霸气登台卍)》之铭言： : Electric utilities pay less for low-quality coal per ton delivered than for : high-quality coal. Yet more low-quality coalthan high-quality coal must be : burned to generate the same amount of electricity. Moreover, per ton of coal : burned,low-quality coal generates more ash than does high-quality coal, and : the disposal of ash is becoming more and more expensive. : The considerations above, if true, most strongly support which of : the following claims? : (A) A coal-burning utility might not be assured of benefiting economically : by always adhering to the policy of keeping its overall coal purchasing : costs as low as possible. : (B) In those regions where the cost of disposing of coal ash is negligible, : it is more expensive for coal-burning utilities to use high-quality : coal than low-quality coal. : (C) Transportation costs represent a smaller proportion of the cost per : delivered ton for low-quality coal than for high-quality coal. : (D) It is no less expensive to dispose of a ton of coal ash that results : from the burning of high-quality coal than it is to dispose of a ton of : coal ash that results from the burning of low-quality coal. : (E) In regions where coal-ash disposal is the least expensive, reserves of : low-quality coal are likely to decline at a faster rate than are : reserves of high-quality coal. : --------------------------------------------------------------------------- : 小弟资质愚钝不解答案为何是A，这题做了快10分钟...超难选择答案最後选了E : 再回过头看A，我的理解A:购买低成本无法保证带来经济利益(不知道这大意对不对) : 可是原文我找不到一个conclusion明确表明low quality就是不实用 : 只有隐性的自己心里认为这个low quality不实用，与其说support，我怎麽觉得这题更 : 像assumption? 请大大指教! 这题为 drawn conclusion，而不是 support support 和 drawn conclusion 的差别在於 "support" 的表达方式 "which of the following best supports the conclusion?" 答案 support 题目，为一般的 support 题， 选出可以 support 题目论点的答案 而此题表达方式为: "The considerations above, if true, most strongly support which of the following claims?" 为题目 support 答案，答案当然就是推论的结果 low quality coal 比起 high quality coal 虽然成本低， 但是相对发电效应不高，产生的灰尘也不好处理 所以自然可以推得经济效应不一定比较好的结论 ---- 2014 台湾最高分 770 GMAT 顾问 Vic - 欢迎大家一起交流 GMAT 问题

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