gre阅读技巧 从主题句能了解到的内容

　　gre阅读技巧是做好阅读的一种方式，学生平时在练习阅读题的时候更应该注重这些技巧的培养和应用。比如，gre阅读并不需要全文通读，其实只要读懂全文的第一句话你就能了解很多信息。下面针对gre阅读这个技巧举个例子。

　　Over the years, biologists have suggested two main pathways by which sexual selection may have shaped the evolution of male birdsong.

　　这是本文的主题句，告诉我们一下的信息：

　　1. 本文探讨的是一个现象，是关于鸟的歌曲的性选择问题。

　　2. 本文是一个新老观点对比型的文章，关键词在第一段中间或者第二段开头

　　3. 本文谈到了进化论，那么在文章后面很可能会否定这个说法，并且可能会进行批驳。

　　4. 下文会以性内和性间选择分别展开进行论述。

　　In the first, male competition and intrasexual selection produce relatively short, simple songs used mainly in territorial behavior. In the second, female choice and intersexual selection produce longer, more complicated songs used mainly in mate attraction; like such visual ornamentation as the peacocks tail, elaborate vocal characteristics increase the males chances of being chosen as a mate, and he thus enjoys more reproductive success than his less ostentatious rivals.

　　The two pathways are not mutually exclusive, and we can expect to find examples that reflect their interaction. Teasing them apart has been an important challenge to evolutionary biologists.

　　Early research confirmed the role of intrasexual selection. In a variety of experiments in the field, males responded aggressively to recorded songs by exhibiting territorial behavior near the speakers. The breakthrough for research into intersexual selection came in the development of a new technique for investigating female response in the laboratory.

　　When female cowbirds raised in isolation in sound-proof chambers were exposed to recordings of male song, they responded by exhibiting mating behavior.

　　By quantifying the responses, researchers were able to determine what particular features of the song were most important. In further experim.

　　其实，gre阅读技巧很简单，只要抓住出题者出题的习惯和规律，就很容易找到突破口，发现做题时的技巧，这样不仅速度提升了，准确率也提高了。