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[Critical Reasoning]
试题详情
题目：
Between 1980 and 2000 the sea otter population of the Aleutian Islands declined precipitously. There were no signs of disease or malnutrition, so there was probably an increase in the number of otters being eaten by predators. Orcas will eat otters when seals, their normal prey, are unavailable, and the Aleutian Islands seal population declined dramatically in the 1980s. Therefore, orcas were most likely the immediate cause of the otter population decline.
Which of the following, if true, most strengthens the argument?
Which of the following, if true, most strengthens the argument?
选项:
A、The population of sea urchins, the main food of sea otters, has increased since the sea otter population declined.
B、Seals do not eat sea otters, nor do they compete with sea otters for food.
C、Most of the surviving sea otters live in a bay that is inaccessible to orcas.
D、The population of orcas in the Aleutian Islands has declined since the 1980s.
E、An increase in commercial fishing near the Aleutian Islands in the 1980s caused a slight decline in the population of the fish that seals use for food.
答案:
C
提问：
可以理解为什么C对，但是为什么E的slight decline是影响很小到可以忽略不计呢？就是小规模的食物减少也会引起seal减少，从而使orca吃otter
解答：
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提问：
可以理解为什么C对，但是为什么E的slight decline是影响很小到可以忽略不计呢？就是小规模的食物减少也会引起seal减少，从而使orca吃otter
解答：
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阅读577
提问：
我理解的这道题逻辑链是：因为seals少了，所以c食物不够，就把o吃掉了，所以o的数量减少了。（o数量减少是因为被c吃掉了）选项要加强这个结论。我觉得A选项是说o的食物没有变少，所以食物不够不是o数量减少的原因，排除了o数量减少是食物不够的原因，是变相加强题目中结论，为什么不对呢
解答：
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提问：
这道题目我错选了B，seal不吃sea otter增加了是orcas吃它的可能性，由于seal数量减少并且它又不吃sea otter不是可以认为是orcas吃了吗……
答案我现在可以理解，可是我不明白这个思路哪里错了，是脑补了吗。
请老师帮忙解答下，谢谢！
解答：
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提问：
刚刚C选项你说活着的海胆orcas吃不到，说明死了的海胆都是它吃的，这不属于脑补吗？（根据上一条的解答重新提问）
解答：
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提问：
觉得C反而像削弱，c说otters住在一个碰不到orcas的地方，就说明orcas并不是otter数量减少的原因啊
解答：
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