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?

1. 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.

2. 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.

3. 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.

4. 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.

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

题中给出的信息是：在没有开新矿的前提下，该地区每家煤厂的产量比五年前翻了一番。

求：根据该信息，得出什么结论

解题思路：如果在五年内煤厂总数量不变，则每家都翻一番，该地区煤的总产量必定翻一番。

题目里面的信息是，由于技术进步，某个煤矿的人均产量在过去五年翻番，问以上人均产量的信息能得出什么结论？

答案A说，如果这个地区矿工的人数不变的情况下，那么这个地区的媒产量就会翻番。这里的miner是矿工的意思而不是煤矿，煤矿是mine

感觉B不对的主要原因是因果倒置

C加入了文中未提供的信息

一开始想选D，不过觉得它更是support.而且文中也没提供此类信息

E文中没给出此信息

根据排除法就只好选A了，而且A没有什么明显的错误

T-3-Q32.

A theory is either true or false. Galileo’s observations of Jupiter’s satellites showed that the Ptolemaic theory of the motion of celestial bodies is false. Therefore, since the Copernican theory of planetary motion is inconsistent with the Ptolemaic account, Galileo’s observations of Jupiter’s satellites proved the truth of the Copernican theory.

The argument above is open to the objection that it makes the questionable assumption that

A.      Whoever first observed something inconsistent with the truth of the Ptolemaic theory should be credited with having proved that theory false.

B.       There are some possible observations that would be inconsistent with the account given by the Copernican theory but consistent with the account given by the Ptolemaic theory.

C.      The Ptolemaic and Copernican theories, being inconsistent, cannot both be based on exactly the same evidence

D.      Numerous counterexamples were necessary in order to show the Ptolemaic theory to be false

E.       The Ptolemaic and Copernican theories, being inconsistent, cannot both be false.

答案是E, 我选了B, 我都完全不明白题跟答案是想说什么...晕