标题: 问一道gwd的逻辑题 [打印本页] 作者: jiejiexi 时间: 2011-4-25 18:46 标题: 问一道gwd的逻辑题 GWD6-Q32: Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. So emission of these “greenhouse” gases contributes to global warming. In order to reduce global warming, emission of greenhouse gases needs to be reduced. Therefore, the methane now emitted from open landfills should instead be burned to produce electricity. Objection: The burning of methane generates carbon dioxide that is released into the atmosphere. Which of the following, if true, most adequately counters the objection made to the proposal? A. Every time a human being or other mammal exhales, there is some carbon dioxide released into the air. B. The conversion of methane to electricity would occur at a considerable distance from the landfills. C. The methane that is used to generate electricity would generally be used as a substitute for a fuel that does not produce any greenhouse gases when burned. D. Methane in the atmosphere is more effective in blocking the escape of heat from the Earth than is carbon dioxide. E. The amount of methane emitted from the landfills could be reduced if the materials whose decomposition produces methane were not discarded, but recycled. 解释如下：建议者说燃烧甲烷可以减小温室效应；反对者说燃烧甲烷产生二氧化碳－>温室效应；题干问反对反对者； D说甲烷比二氧化碳产生的温室效应更厉害，也就是说燃烧还是能减少温室效应的。 不能理解D的逻辑，既然是甲烷比二氧化碳产生的温室效应更厉害，那么应该是燃烧甲烷是会增加温室效应的，应该是对反对者的支持呀。作者: Kb24 时间: 2011-4-25 18:59
烧甲烷使甲烷减少---烧的同时增加了二氧化碳，D说甲烷造成温室效应比二氧化碳强，那么烧甲烷释放二氧化碳还是支持PROPOSAL的，削弱了OBJECTION作者: jiejiexi 时间: 2011-4-26 08:47
谢谢楼上的 懂了