是一道阅读理解题,全文如下: The Biological Approach. Numerous biological structures and chemicals appear to be involved in aggression. One is the hypothalamus, a region of the brain. In response to certain stimuli, many animals show instinctive aggressive reactions. The hypothalamus appears to be involved in this inborn reaction pattern: electrical stimulation of part of the hypothalamus triggers stereotypical aggressive behaviors in many animals. In people, however, whose brains are more complex, other brain structures apparently moderate possible instincts.
Question: According to paragraph 2, what evidence indicates that aggression in animals is related to the hypothalamus?
1/ Some agggressive animal species have a highly developed hypothalamus. 2/ Artificial stimulation of the hypothalamus results in aggression in animals. 3/ Animals behaving aggressively show increased activity in the hypothalamus. 4/ Animals sho lack a hypothalamus display few aggressive tendencies.
我 觉得答案应该是2,但是官方指南给的答案是3,理由是:Choice 2 is incorrect because, while the paragraph states that "electrical stimulation" triggers aggressive behavior in many animals, this is not "evidence" in itself, but merely support for the more general statement in choice 3 that increased hypothalmusic activity, in general, is related to aggression.
我觉得这个解释不对,因为文章里根本没有提到Animals behaving aggressively show increased activity in the hypothalamus这个因果逻辑关系。而且我不明白为什么choice 2不是evidence。请大牛们指点。谢谢啦!
感谢楼上两位TX的帮助。我分析了一下这段文字的逻辑关系。我承认如果没有B选项的情况下,C选项是一个很好的答案。但是我的疑问是C选项的逻辑关系。C说的是Animals behaving aggressively show increased activity in the hypothalamus.即aggression是因,导致了increased activity in the hypothalamus这个果,这个因果关系显然和文章里所说的Artificial stimulation of the hypothalamus results in aggression in animals.即stimulation是因,aggression是果是不同的。就是aggression -> increased hypothalamus activity 不等于increased hypothalamus activity -> aggression。所以我才觉得选项B应该更正确。而且我不明白为什么OG说B不是一个EVIDENCE,如果一个试验不是什么EVIDENCE,那什么是EVIDENCE?