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题库 / GMATLA-SC-40
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.
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.
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.
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.
d项是独立主格，但是这里独立主格只是表示一种状态，而根据句意两者之间明显有因果关系，所以排除d
初看五个全排除了；后来定在AB之间，最终错误的选择了B；
为什么D不能看作是独立主格……？
个人感觉即使能看成独立主格后，因果关系能被间接有效地表达出来吗
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为什么C不能理解为原因状语，因果关系不就正好解决了嘛。。。。
个人认为C选项的错误在于主句的时间状语over the 18 century不是时间点，所以用完成时态比一般过去时更合适。 但with引导的独立主格结构与主句是有逻辑关系表伴随状态，应同时发生；若主句改成完成时，逻辑上跟独立主格结构是不可能同时发生的，因此这个选项怎么改都是错误的。但是A选项的时间状语也是时间段，也有同样的错误，并且as a result of 和 because 做平行好牵强。。。一个引导短语一个引导句子。求辨析
个人觉得能来这道题纠结的都是高手啊了，哈哈
查了一下，GWD的题，争议比较大，江湖上也没有个官方的说法，如果正确答案真的规定选A的话，只能说as a result of和because来并列引起的不舒服，没有C选项里的being replace那么罪孽深重吧，别的也没有什么好解释的了，其他的A和C都差不多。
还是forest and trees的问题，如果真在考场上遇到了这题，选不对算你倒霉，但是一道题，顶多总分会差10分吧，^ _ ^
【#求证 是否正确？】
[Correct Usage 2] When passive continuous verb tense is required to communicate the meaning.
For example:The residents of this 100-year old apartment complex are being evacuated because of structural instability of the building. Notice the verb tense here – are being evacuated – present continuous written in passive voice.
【转自 https://gmatclub.com/forum/over-the-course-of-the-eighteenth-century-the-average-34885.html】
being只有在上述两种情况下才正确？
【#求证 是否正确？】
[Correct Usage 1] When Being is used as a noun. For example: Being disrespectful to elders is not an acceptable behavior.
Notice the subject here – being disrespectful to her elders
【转自 https://gmatclub.com/forum/over-the-course-of-the-eighteenth-century-the-average-34885.html】
求老师分析一下AC，群众的呼声很高啊
C选项的问题还是想请老师点评一下。
是因为C选项改成伴随之后，不再表示因果关系，所以错了吗？原文段是有因果关系的。
但是在 https://www.manhattanprep.com/gmat/forums/prep-q-because-of-wireless-service-costs-plummeting-t6871.html
里面第一题里面原句用的是because,但是正确答案用的with，那不也改变了句意？
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D错在哪里？是因为没有因果关系吗
D选项两个分句之间没有连词
D选项是独立主格结构吧
独立主格的结构是【名词+分词短语】
D选项前面分句的主干只是两个并列的名词，后面跟的【介词+分词】结构是名词的修饰部分，并木有构成独立主格结构呢。
D的前半句不是分句是短语吧，used缺了was。D现在的结构无法表达因果关系，前半句和后半句是一个因果关系，所以需要因果连词。
独立主格是名词+分词/形容词/副词/介词短语，都可以。我觉得这题的问题是replacement和improvement的问题，不应该用名词形式（名词表示结果），应该用分词形式才能比较好地表达出意思
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[ref: gmatclub]
There are two ambiguous points:
1. Sentence C fails to show the causal relationship between 'the output of iron' and 'those technique improvements'.
2. the adverbial modifier in sentence C failed tell us when those techniques improvements happened.
A选项的as a result of和because相互不产生赘余吗？
C选项错在哪里？and前后不平行？
求讲解T^T
为什么看到有些地方答案是C。。
A中的as a result 和 because 可以并列吗？
可以啊，and并列成分前后省略了相同的部分，还原之后就应该是the average output of ironwork tripled （as a result of several improvements in blowing machinery） and the average output of ironwork tripled because coal replaced charcoal.
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这么好的题目，老师讲一讲。要是考试，谁敢选A啊。
同问
求老师分析一下AC，群众的呼声很高啊
同问，期待毕出老师解答一下！
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