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标题: 想问下各位大神一道CR的题目！！ [打印本页]

作者: 求上700 时间: 2019-11-4 12:20
标题: 想问下各位大神一道CR的题目！！

Many industrialized nations are trying to reduce atmospheric concentrations of carbon dioxide, a gas released by the burning of fossil fuels. One proposal is to replace conventional cement, which is made with calcium carbonate, by a new "eco-cement." This new cement, made with magnesium carbonate, absorbs large amount of carbon dioxide when exposed to the atmosphere. Therefore, using eco-cement for new concrete building projects will significantly help reduce atmospheric concentrations of carbon dioxide.

Which of the following, if true, most strengthens the argument?

AThe cost of magnesium carbonate, currently greater than the cost of calcium carbonate, probably will fall as more magnesium carbonate is used in cement manufacture.
BEco-cement is strengthened when absorbed carbon dioxide reacts with the cement.
CBefore the development of eco-cement, magnesium-based cement was considered too susceptible to water erosion to be of practical use.
DThe manufacture of eco-cement uses considerably less fossil fuel per unit of cement than the manufacture of conventional cement does.
EMost building-industry groups are unaware of the development or vailability of eco-cement.
一直在BD两个选项里面纠结，D选项正确的原因我理解了
关于B选项，我自己的理解是重复前提
OG的解释是即使吸收了二氧化碳变硬，eco-cement不一定能作为广泛运用的建筑材料，更谈不上减少二氧化碳了
我自己觉得OG的解释确实是有道理，但是不知道怎么归这一类的错误（OG的的解释总让我觉得它是在根据具体情况破案，不是在做题哈哈哈）另外感觉平常自己做题想不到这个点，想问问大神们是缺乏练习吗，

作者: AlanHeeee 时间: 2019-11-4 13:47
闲，随便说两句
不要分类，不要琢磨为什么（如何支持/反对），不要你以为应该怎样

原文就一个事，用一个新的MC代替传统的C，因为可以减少二氧化碳
选项只有D说到了化石燃料，和二氧化氮多少的事情沾点边，留着；其他都不沾，杀。结束
#这是你考场时候的唯一可行方法

作者: 求上700 时间: 2019-11-4 19:36

AlanHeeee 发表于 2019-11-4 13:47
闲，随便说两句
不要分类，不要琢磨为什么（如何支持/反对），不要你以为应该怎样

有道理哈，谢谢！

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