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.
文中根本没有提到 number of miners working
Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened. 有new mines因此C 对
虽然A中没有明示Coal output per miner,但A中归纳出的结论是ABOUT每个矿工产出量的,我也开始选C,就是因为even though,但题目描述中没有说IF NEW MINES OPEN,产量就一定会增加,even though表达的也是一种可能语气,可以理解为如果新矿开工,产量没准还会更大呢。另外,Coal output per miner是由技术决定的不是吗,和新矿开工有联系吗?我也迷惑了。。。
虽然A中没有明示Coal output per miner,但A中归纳出的结论是ABOUT每个矿工产出量的,我也开始选C,就是因为even though,但题目描述中没有说IF NEW MINES OPEN,产量就一定会增加,even though表达的也是一种可能语气,可以理解为如果新矿开工,产量没准还会更大呢。另外,Coal output per miner是由技术决定的不是吗,和新矿开工有联系吗?我也迷惑了。。。
我认为,原文even though no new mines have opened,只是告诉在没有new mines open的情况下per miner的output就double了。由这句话,不能推出new open的mine究竟是增加还是减少per miner output。