gwd-1-14

hlin4

Q14:

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?

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.

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.

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.

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.

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

The correct answer is (A), no doubt. Any XDJM tells me why (B) is not correct?

Thanks a lot!

happyfish0517

Gwd 逻辑讨论汇总参考版---每日更新中  [ 2 3 4 5]

cranberry

b从文中是推导不出的。理由是，即使不是每个总产出增加的煤矿都取得人均产出增加，并不妨碍文中的结论出现。因为文中的结论应根据 总产出/总工人数  而得出的。

好久没来逻辑区了，头脑都不太灵光了，呵呵。