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托福阅读真题100篇原文+题目(七十)

2018-04-17 11:21:00来源:网络

  提升阅读速度,掌握做题技巧,是拿到托福阅读高分必须要突破的两个方面,那么具体的托福备考的过程中,大家应该运用哪些资料来备考呢?新东方在线托福网为大家带来了托福阅读真题100篇,供大家练习。

【点击查看托福阅读真题100篇原文+题目汇总】

  PASSAGE 70

  The origins of nest-building remain obscure, but current observations of nest-building activities provide evidence of their evolution. Clues to this evolutionary process can be found in the activities of play and in the behavior and movements of birds during mating, such as incessant pulling at strips of vegetation or scraping of the soil. During the early days of the reproductive cycle, the birds seem only to play with the building materials. In preparation for mating, they engage in activities that resemble nest-building, and continue these activities throughout and even after the mating cycle. Effective attempts at construction occur only after mating.

  Although nest-building is an instinctive ability, there is considerable adaptability in both site selection and use of materials, especially with those species which build quite elaborate constructions. Furthermore, some element of learning is often evident since younger birds do not build as well as their practiced elders. Young ravens, for example, first attempt to build with sticks of quite unsuitable size, while a jackdaw's first nest includes virtually any movable object. The novelist John Steinbeck recorded the contents of a young osprey nest built in his garden, which included three shirts, a bath towel, and one arrow.

  Birds also display remarkable behavior in collecting building materials. Crows have been seen to tear off stout green twigs, and sparrowhawks will dive purposefully onto a branch until it snaps and then hang upside down to break it off. Golden eagles, over generations of work, construct enormous nests. One of these, examined after it had been dislodged by high winds, weighed almost two tons and included foundation branches almost two meters long. The carrying capacity of the eagles, however, is only relative to their size and most birds are able to carry an extra load of just over twenty percent of their body weight.

  1. The word obscure in line 1 is closest in meaning to

  (A) interesting

  (B) unclear

  (C) imperfect

  (D) complex

  2. According to the passage , which of the following activities is characteristic of the early part of the reproductive cycle of birds?

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