标题: prep2-13 [打印本页]
作者: wahabirds 时间: 2010-6-18 06:52 标题: prep2-13
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?
(A) The cooling effect triggered by volcanic eruptions in 1985 was counteracted by an unusual warming of Pacific waters.
(B) There is a strong statistical link between volcanic eruptions and the severity of the rainy season in India.
(C) 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.
(D) The climatic effects of major volcanic eruptions can temporarily mask the general warming trend resulting from an excess of carbon dioxide in the atmosphere.
(E) Three months after an early springtime eruption in South America during the late 19th century, sea surface temperatures near the coast began to fall.
答案是C 想问一下D为什么不对呢？谢谢
作者: zongzeng90 时间: 2010-6-18 22:33
D是加强啊 说volcanic eruptions 可以改变 warming trend
作者: wahabirds 时间: 2010-6-19 07:44
但是结论不是说 eruption能让空气变冷么，D说能让空气变热，这个不是削弱么？还是我理解错了呢？
作者: xiaotangyu 时间: 2010-6-20 07:11
D选项说火山爆发的气候效应可以暂时掩盖由CO2导致的气候变暖， 也就是暂时COOLER， 算是个加强了
作者: rosswye 时间: 2010-6-21 06:57
D是不是这样的：
二氧化碳增多（不是由火山爆发引起）——气候变暖——被火山爆发掩盖，意思就是火山爆发可以使气候变冷
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