TPO 34 阅读第2篇 第9题Which of the following is NOT mentioned in paragraph 5 as a ...为什么答案是C

TPO 34 阅读第2篇 第9题Which of the following is NOT mentioned in paragraph 5 as a ...为什么答案是C

A 选项对应 switch over rapidly from limited charcoal to unlimited coke (which is made from coal) in the smelting of pig iron，即 powerful, steam-driven bellows 在 blast furnaces 的使用使得冶炼生铁时由使用木炭变为使用焦炭， 正确；B 选项对应 allowed pig iron to be refined in turn with coke, 即 puddling furnace 的发明可以用焦炭来铸铁，正确； C 选项增加木炭产量的方法原文未提及； D 选项对应 Cort also developed heavy-duty, steam-powered rolling mills, which were capable of producing finished iron in every shape and form 即 rolling mills 的使用可以生产出不同形状和规格的 finished iron，正确。