主旨题顾名思义肯定是要根据文章的“主要内容”作答，而同学们经常会根据自己的“直觉”和读完文章之后脑海里残留的“印象”来判断文章的主要内容是什么，从而就会形成“篇幅多的内容即为主要内容”的错觉。也是很多同学从之前一些英语考试中延续下来的思路，而这种思路在GRE中是极端不可取的。
文章：
很多长得不帅的男演员也可以成为男神级的人物。比如，黄渤虽然长得不帅，但是他在综艺节目中表现出了极高的情商非常圈粉。大家都说黄渤这个人唯一的缺点就是人太好！而且演技也是可圈可点让人折服。就连导演的处女座《一出好戏》也超出很多人的预期，惊喜地没有扑gai。
Q：这篇文章的主旨是什么呢？
A. 赞美黄渤的情商和业务能力
B. 论证很多长得不帅的男演员也可以成为男神级的人物
就像刚刚这个题，我们是考虑文章句子之间的关系，利用句子的功能来帮助我们筛选文章主线的。这是在解主旨题时候的核心原则！
Although social learning (the acquisition of specific behaviors by observing other individuals exhibiting those behaviors) is well documented among fish, few studies have investigated social learning within a developmental context in these taxa. Rather than investigating the development of a particular skill, Chapman, Ward, and Krause investigated the role of group density during development in later foraging success in laboratory-housed guppies. When raised with a small number of conspecifics (members of the same species), guppies were quicker to locate food by following a trained adult guppy than were guppies raised in large groups. This counterintuitive finding is explained by the fact that guppies reared in the high-density condition were less likely to shoal (swim in a group) with others and, therefore, were less likely to learn the benefits of social learning. Instead, fish reared in high-density situations may learn that conspecifics are to be viewed as competitors, rather than as potential sources of adaptive information. This finding suggests that at least for guppies, the early social environment may have an effect on the capacity for social learning, if not on the socially learned behaviors themselves.
最后来总结一下！
GRE阅读主旨题的核心原则