问答题 Every summer, the peacocks that roam free within Whipsnade Wild Animal Park in Bedfordshire expose their magnificent trains to the critical and often disdainful gaze of the hens.

问答题 What does Darwin's "beauty for beauty's sake" about peacocks mean?

【正确答案】Sexual selection is the driving mechanism of the evolution of peacocks' tail．

【答案解析】(文章第三段首先指出最适合生存即意味着最坚强、最迅速、最聪明和最警觉，但是孔雀的尾屏往好了说是浪费空间，实际上是很大的累赘，因此达尔文提出了独立于“自然选择进化论”的进化机制，即sexual selection“雌雄淘汰”，用他的话来说就是“beauty for beauty's sake”。)

问答题 Why does the author say that Wallace was in other ways even more Darwinian?

【正确答案】According to Wallace, peacocks' train is an advertisement for some genuine contribution to survival．

【答案解析】(第四段首句介绍到达尔文的朋友和合作者华莱士虽然在很多方面比达尔文更加“浪漫”，但在其他方面比达尔文有过之而无不及(even more Darwinian)，接着该段对此进行了解释说明：当时华莱士认为，孔雀的尾屏不是一种目的，而彰显了其在生存方面所真正起到的作用。)

问答题 What's scientists' conclusion after long observation of peacocks' behaviour?

【正确答案】Peacocks with the most eye-spots on the train do indeed attract the most mates．

【答案解析】(第五段指出一个世纪后，关于孔雀尾屏争议的仍未得到解决，原因是对孔雀自然行为的研究比想象中更加困难，该段最后指出“长期的观察结果和照片表明，尾屏上眼状斑点最多的孔雀确实能吸引到最多的配偶”。)

问答题 What is the "final twist" mentioned in the passage?

【正确答案】The proposal of Fisher's Runaway in the thirties．

【答案解析】(final twist出现在最后一段首句，该句指出“事情有了最后的转折”，接下来一句便引出30年代伟大数学家、生物学家Fisher提出的“Fisher's Runaway”理论。)

问答题 What's the relationship between "Fisher's Runaway" and Darwin's "beauty for beauty's sake"?

【正确答案】Fisher's Runaway would vindicate Darwin's "beauty for beauty's sake"．

【答案解析】(最后一段对“Fisher's Runaway”理论进行举例说明后，于最后一句概括指出“Oddly, too, this would vindicate Darwin's apparently fanciful notion-once the process gets going, the females would indeed be selecting "beauty for beauty's sake"，即奇怪的是，Fisher's Runaway理论最终证明了达尔文“雌雄淘汰”理论的正确性，即“beauty for beauty's sake”。)