Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore. - Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore. 别扭啊
- Over the course of the eighteenth century a tripling in the average output of ironwork was due to the replacement of charcoal by coal for the fuel used in the smelting of iron ore, in addition to several improvements in blowing machinery.
- With charcoal’s being replaced by coal as the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century. 又不平行,又别扭
- The replacement of charcoal with coal for the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century. 不对
- Charcoal being replaced by coal as the fuel used in the smelting of iron ore, and several improvements in blowing machinery, which tripled the average output of ironwork over the course of the eighteenth century. 不平行,无主
查了一下GOOGLE 有句话是 By 1875, coke (which is made from coal) replaced charcoal as the primary fuel for iron blast furnaces to make steel. 另外一句原句是 In eighteenth-century Britain, coal replaced charcoal as the fuel in the smelting of iron ore. As well, improvements in blowing machinery allowed a tripling of the average size of ironworks over the course of the eighteenth century. 又查了一下with complete replacement of charcoal by coke 是可以的 查了一下 REPLACE STH AS THE REPALCEMENT OF STH BY STH AS THE REPLACEMENT OF STH WITH STH AS 却没有 THE REPLACEMENT OF STH WITH STH FOR 不知道答案因次是不是应该选A NN 帮忙啊 ![](/static/legacy-emoticon/Dvbbs/em06.gif)
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