repeats one song type before switching to another

　　 responds agGREssively to recorded songs

　　27.The passage suggests that the song sparrow experiments mentioned in lines 37-43 failed to confirm the role of intersexnal selection because At first, however, researchers doing fieldwork with song sparrows found no correlation between larger repertoires and early mating, which has been shown to be one indicator of reproductive success

　　原因就是没有关系，答案肯定有否定词。

　　A) females were allowed to respond only to the song structure

　　 song sparrows are unlike other species of birds

　　 the experiments provided no evidence that elaborate songs increased male reproductive success

　　 the experiments included the songs of only a small number of different song sparrows

　　 the experiments duplicated some of the limitations of previous field studies

【GRE阅读笔记技巧分析】相关文章：

★ GRE阅读听课笔记(6)

★ 新GRE逻辑阅读理解剖析：段中点选题

★ gre阅读长难句实例分析7

★ GRE阅读关键在于把握词义

★ 新GRE阅读技巧解析

★ GRE阅读题型之细节题详细分析（3）

★ gre阅读长难句实例分析36

★ GRE阅读长难句解读（11）

★ gre阅读长难句实例分析29

★ GRE阅读难句要点解读