Twenty 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.
题目是什么意思？可有NN翻译一下。 作者: Benite 时间: 2012-1-31 13:26
107. (GWD-TN-12,T-4-Q2)
Twenty 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.
20年前，B出台一个法规，要求采集表面煤矿的支付Reclamation of mined-out land。
自从那个时候，R的技术就没有改进。
但是，平均R的成本现在只要4刀每吨煤矿产生的C，少于一半当时政策刚开始实行的时候。
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.与其他国家无关
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作为燃料的使用下降无关。
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.不再在贵的地方采集了，成本就下降了咯。
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.无关比较
E. As compared to twenty years ago, a greater percentage of the coal mined in Balzania today comes from surface mines.
这个是我之前做这道题目之后做的总结
虽然也不是很懂题目的意思...
等NN来~作者: joliegu 时间: 2012-2-1 07:17
C
不在山上开采了，因为开垦的成本比较高作者: tulip37 时间: 2012-2-1 20:51
非NN，攒点人品，提供点想法
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. (其他国家，无关比较)
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. (作为fuel减少不代表作为其他用途没有增加，除非没有更好的答案再选它)
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. (不在贵的地方开垦，成本自然没提高；比B好的原因是它没有限制条件，选它)
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. (其他mines，无关比较)
E.As compared to twenty years ago, a greater percentage of the coal mined in Balzania today comes from surface mines. (没说到costs，无关) 作者: interlove11 时间: 2012-2-3 21:18
