两道逻辑题
1Twenty years ago, Balzania put in place regulations requiring operators of surface mines to pay for the reclamation of mined-out land. Since then, reclamation technology has not improved. Yet, the average reclamation cost for a surface coal mine being reclaimed today is only four dollars per ton of coal that the mine produced, less than half what it cost to reclaim surface mines in the years immediately after the regulations took effect.
Which of the following, if true, most helps to account for the drop in reclamation costs described?
A. Even after Balzania began requiring surface mine operators to pay reclamation costs, coal mines in Balzania continued to be less expensive to operate than coal mines in almost any other country.
B. In the twenty years since the regulations took effect, the use of coal as a fuel has declined from the level it was at in the previous twenty years.
C. Mine operators have generally ceased surface mining in the mountainous areas of Balzania because reclamation costs per ton of coal produced are particularly high for mines in such areas.
D. Even after Balzania began requiring surface mine operators to pay reclamation costs, surface mines continued to produce coal at a lower total cost than underground mines.
E. As compared to twenty years ago, a greater percentage of the coal mined in Balzania today comes from surface mines.
2
GWD-18-Q16
Aroca City currently funds its public schools through taxes on property. In place of this system, the city plans to introduce a sales tax of three percent on all retail sales in the city. Critics protest that three percent of current retail sales falls short of the amount raised for schools by property taxes. The critics are correct on this point. Nevertheless, implementing the plan will probably not reduce the money going to Aroca’s schools. Several large retailers have selected Aroca City as the site for huge new stores, and these are certain to draw large numbers of shoppers from neighboring municipalities, where sales are taxed at rates of six percent and more. In consequence, retail sales in Aroca City are bound to increase substantially.
In the argument given, the two potions in boldface play which of the following roles?
A. The first presents a plan that the argument seeks to defend against a certain criticism; the second gives part of the basis for that criticism.
B. The first presents a plan that the argument seeks to defend against a certain criticism; the second gives part of the basis for that defense.
C. The first presents a plan that the argument criticizes; the second is a consideration raised by the argument in support of that criticism.
D. The first presents a plan that the argument criticizes; the second presents a consideration that has been raised against that criticism.
E. The first presents a plan whose consequences the argument seeks to evaluate; the second is presented by the argument as one likely consequence that is undesirable.
[[i] 本帖最后由 danieljin414 于 2008-12-13 22:49 编辑 [/i]] 第二题粗体部份是什么？
楼主对这两题有什么问题？ 郁闷 想了很久 往下拉才发现没有答案 第一题选c 要注意average cost of reclamation这句话 照应了山区的reclamation cost高于平均水平 稀里糊涂 不过听了各位的讲解明白了
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