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[Critical Reasoning]

试题详情

题目:

In the late 1980’s, the population of sea otters in the North Pacific Ocean began to decline. Of the two plausible explanations for the decline—increased predation by killer whales or disease—disease is the more likely. After all, a concurrent sharp decline in the populations of seals and sea lions was almost certainly caused by a pollution-related disease, which could have spread to sea otters, whereas the population of killer whales did not change noticeably.

Which of the following, if true, most seriously weakens the reasoning?

选项:

A、Killer whales in the North Pacific usually prey on seals and sea lions but will, when this food source is scarce, seek out other prey.
B、There is no indication that substantial numbers of sea otters migrated to other locations from the North Pacific in the 1980’s.
C、Along the Pacific coast of North America in the 1980’s, sea otters were absent from many locations where they had been relatively common in former times.
D、Following the decline in the population of the sea otters, there was an increase in the population of sea urchins, which are sea otters’ main food source.
E、The North Pacific populations of seals and sea lions cover a wider geographic area than does the population of sea otters.

答案:

A

提问:

原文说北太平洋水獭的数量在下降,两个解释,一个是被鲨鱼吃了,一个是生病死了,生病更可能,因为另外两个海洋生物生病能传染给水獭,鲨鱼的数量每怎么变。 我选的D,选项目和原文都围绕着水獭的数量的下降这个事情谈的,后面的urchin看似无关,实际上和水獭联系上了。老师不是说可以演绎吗?这个选项把u列为水獭下降的原因有老师说的打开其他出口来驳斥的感觉啊。我怎么觉得A无关呢?A是如何驳斥的?

解答:

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解答: sysadmin

提问:

向唐瑭老师提问: 唐老师,我这里只看题目最后一句,知道题目在说这个海豹和海狮数量的下降是因为污染导致的,但是另一种鲸鱼的数量没有变。 这题在选项中我没找到一个特别好的。在对比之后我选了D,觉得这里提到了population,提到了这个什么sea otter,就选了。我排除掉正确选项A是觉得这里在讲鲸鱼捕食的问题,既没有提到海狮数量减少,也没提到什么污染疾病的。麻烦唐老师给我讲讲这题您的思路。感谢。

解答:

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解答: 唐瑭老师

提问:

感觉正确答案A 里面的other prey 没说准。other prey 可能不是Otters 呢?

解答:

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解答: sysadmin老师

提问:

我第一次选了B,因为读成了“没有下降的指示,因为都去其他地方了”。听了录音后,B的读法应该是“没有(下降是因为都去其他地方了)的指示”,那么B更像支持,所以要排除,这我能理解。但是A的相关性我实在看不出来,这样下去我排除了5个选项,我读到的A的意思就是“killerwhale在海豹稀少的时候吃其他动物”,怎么样才能让我感觉A比其他选项要好?

解答:

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解答: sysadmin老师

提问:

原文说北太平洋水獭的数量在下降,两个解释,一个是被鲨鱼吃了,一个是生病死了,生病更可能,因为另外两个海洋生物生病能传染给水獭,鲨鱼的数量每怎么变。 我选的D,选项目和原文都围绕着水獭的数量的下降这个事情谈的,后面的urchin看似无关,实际上和水獭联系上了。老师不是说可以演绎吗?这个选项把u列为水獭下降的原因有老师说的打开其他出口来驳斥的感觉啊。我怎么觉得A无关呢?A是如何驳斥的?

解答:

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阅读6425
解答: sysadmin老师

提问:

C可不可以认为是因为他们的离开导致的数量的下降呢。

解答:

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解答: sysadmin老师

提问:

感觉A 无关,请老师说说选项的感觉,谢谢~

解答:

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解答: sysadmin老师

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