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标题: gwd上一道题就结了好久求大神赐教 [打印本页]

作者: larkspur 时间: 2011-4-3 16:44
标题: gwd上一道题就结了好久求大神赐教
That the application of new technology can increase the productivity of existing coal mines is demonstrated by the case of Tribnia’s coal industry. Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened.

Which of the following can be properly concluded from the statement about coal output per miner in the passage?

A. If the number of miners working in Tribnian coal mines has remained constant in the past five years, Tribnia’s total coal production has doubled in that period of time.

B. Any individual Tribnian coal mine that achieved an increase in overall output in the past five years has also experienced an increase in output per miner.

C. If any new coal mines had opened in Tribnia in the past five years, then the increase in output per miner would have been even greater than it actually was.

D. If any individual Tribnian coal mine has not increased its output per miner in the past five years, then that mine’s overall output has declined or remained constant.

E. In Tribnia the cost of producing a given quantity of coal has declined over the past five years.

作者: littlexian 时间: 2011-4-3 17:10
Answer A ?

作者: 毛毛的臭脚丫 时间: 2011-4-3 17:13
选A？

作者: 毛毛的臭脚丫 时间: 2011-4-3 17:28
最后那句话 even though no new mines have opened.作者想表达开采量的提高和矿井的数量无关，因为矿井越多，产量会越多，而本文强调的是新技术的作用才使产量翻倍了。
但如果工人数量不变的话，就算矿井再多，产量也是不变。问题问能从文章中推出什么来，就是过去五年人数不变的情况下，工人采用新技术然后产量翻倍了。所以关键是人数保持稳定的情况下才能体现出新技术的作用。

答案要不是A的话就当我白说了。。

作者: eatGMAT 时间: 2011-12-21 16:44

最后那句话 even though no new mines have opened.作者想表达开采量的提高和矿井的数量无关，因为矿井越多，产量会越多，而本文强调的是新技术的作用才使产量翻倍了。
但如果工人数量不变的话，就算矿井再多，产量也是不变。问题问能从文章中推出什么来，就是过去五年人数不变的情况下，工人采用新技术然后产量翻倍了。所以关键是人数保持稳定的情况下才能体现出新技术的作用。

答案要不是A的话就当我白说了。。

-- by 会员毛毛的臭脚丫 (2011/4/3 17:28:35)

豁然开朗了！谢谢臭脚丫

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