prep - 13题 不懂呀

alannesta

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.（答案）

(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.

alannesta

恩 这个支持 我理解了

weixuan

D is in fact a strengthener of the original argument, which claims that major eruptions cause the atmosphere to become cooler than it would be otherwise. It simply provides a reason to explain how an erruption can stop the general WARMING trend for a brief time. So D is not a weakener for the question.

supermanlee

后半句，，，是说能够暂时性缓解这种由二氧化物。。。的excess 。。造成的变暖趋势。。。

这样看也是无关选项撒

trtwarrior

(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.
eruption带来的气候效应会暂时掩盖气候转暖的趋势（这种趋势是由大气中过量的二氧化碳引起的）。

这应该是一个无关选项。原结论：eruptions引起天气比正常情况下寒冷。此项只能说明气候的转暖和eruption没有关系，而是另外的因素。因此，即使证明气候是变暖的，也不能削弱原结论。

supermanlee

我觉得、、、D：这种eruption带来的气候变化能暂时性的阻挡变暖的趋势，也是支持啊。。。

alannesta

D  选项错哪里啦

trtwarrior

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.
1984年夏天的 LV eruption引起蓝霾，那年的冬天奇寒无比。
结论：eruptions引起天气比正常情况下寒冷。


(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.
1982年4月在E eruption爆发后的几个月，从长期的气候趋势看整个区域的气候温度比正常情况下都要高。这显然和结论是相反的。