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题库 / Prep2007E2-CR-13
An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984. Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.
Which of the following statements, if true, most seriously weakens the argument above?
The cooling effect triggered by volcanic eruptions in 1985 was counteracted by an unusual warming of Pacific waters.
There is a strong statistical link between volcanic eruptions and the severity of the rainy season in India.
A few months after El Chichn's large eruption in April 1982, air temperatures throughout the region remained higher than expected, given the long-term weather trends.
The climatic effects of major volcanic eruptions can temporarily mask the general warming trend resulting from an excess of carbon dioxide in the atmosphere.
Three months after an early springtime eruption in South America during the late 19th century, sea surface temperatures near the coast began to fall.
文章说的就是eruption导致blue haze再导致sever winter，既然要削弱，就是驳因驳果驳因果关系。
A说的是火山爆发导致的寒冷效应被中和了，所以反过来证明之前的火山爆发确实有cooling effect，然后才可能出现被中和的现象，所以是加强。
B开始说了一个统计数据，这实际上可能属于“权威观点”，不太可能正确。
C说的是在火山爆发后的气温反而升高，所以引用新的现象直接反驳火山爆发导致寒冬。
D说的是火山爆发后的天气能够掩盖火山爆发产生出的co2,而co2能够使气温升高，所以是个加强，说明火山爆发后又cooling effect才能够掩盖co2导致的气温升高
E说的是海洋表面温度升高，与文中讨论的气温升高无关，所以是无关选项
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