题目选项分析

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?

【选项】Seals do not eat sea otters, nor do they compete with sea otters for food.

选项是否正确？

是否

答对用户笔记

1人: liyu3305 2017-07-19 15:07:47

seal的数量已经减少，所以seal吃otter与否不影响其数量变化。

0人: chris328 2021-09-08 01:06:03

这是啥啊？？？？

0人: llxxyynoll 2020-12-14 12:14:38

无关选项，文章前提就是Seals数量下降了，导致了otter成为了Orcas的猎物。

0人: wswxyyyy 2019-06-16 13:50:49

原文中已经暗示了：seals cannot be the cause of the declining otters.
原文中已经出现过的，在演绎类题目的正确答案中不会再出现

0人: raintsai 2019-03-16 16:39:31

海豹不吃海獺，也不會與海獺競爭食物，看似雖然加強海報與海獺兩者間互不影響，唯一影響因素僅受到虎鯨。但題目中已經提到，海豹數量在1980年代已經急速下降，故海獺數量僅會受到虎鯨影響。

0人: GPaaaa 2018-09-22 09:30:14

this is the assumption which "Orcas will eat otters when seals, their normal prey, are unavailable"relies on

0人: feifl1023 2018-03-18 23:40:19

海豹和他竞争食物，并不能构成海獭数量减少的他因

0人: linchiay 2018-03-12 23:49:54

contradict with the argument, which states that seals populations declined

题目基本信息

所属科目：逻辑CR
题目来源1：OG16-106
题目来源2：OG17-647
题目来源3：OG18-648
题目来源4：OG19-648
题目来源5：OG20-739
题目来源6：OG2022-796

难度：难