oldprep-cr2-13

slmne

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.

lovesiqi4665

A，1985年由火山爆发引出的冷效应被太平洋暖流抵消了。不能削弱题目啊？！

题目结论是84年冬的冷是由冰岛火山爆发造成的。A只能证明火山爆发有

可能引起冷效应，而且这种冷效应有可能会被太平洋暖流抵消。仅此而已。但

是并不能说明欧洲84年的冷一定是，或者一定不是，由火山爆发造成的。对么？


C说另一处82年火山爆发，造成了几个月后的气温升高。证明有时候（至少这

一次）火山爆发是造成热效应，而非冷效应。因此证明不一定每次火山爆发都

回造成冷效应，因此削弱原文结论。

slmne

明白了 THS

qiuhua012345

我想问下 D E也不是说了气温上升吗？为什么就不对了呢