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托福阅读推断题范例(9)

2015-07-31 16:19:40来源:网络

  【托福阅读推断题范例(9)】托福阅读推断题本质是逻辑推理型事实信息题。新东方在线托福网为大家带来托福阅读推断题范例(9),希望对大家托福备考有所帮助。更多精彩尽请关注新东方在线托福网!

  查看全部:托福阅读推断题范例及答案

  托福阅读推断题例题

  例题9:

  Paragraph 4:Given that predators can make it costly to beg for food, what benefit do begging nestlings derive from their communications? One possibility is that a noisy baby bird provides accurate signals of its real hunger and good health, making it worthwhile for the listening parent to give it food in a nest where several other offspring are usually available to be fed. If this hypothesis is true, then it follows that nestlings should adjust the intensity of their signals in relation to the signals produced by their nestmates, who are competing for parental attention. When experimentally deprived baby robins are placed in a nest with normally fed siblings, the hungry nestlings beg more loudly than usual—but so do their better-fed siblings, though not as loudly as the hungrier birds.

  Paragraph 5:If parent birds use begging intensity to direct food to healthy offspring capable of vigorous begging, then parents should make food delivery decisions on the basis of their offsprings calls. Indeed, if you take baby tree swallows out of a nest for an hour feeding half the set and starving the other half, when the birds are replaced in the nest, the starved youngsters beg more loudly than the fed birds, and the parent birds feed the active beggars more than those who beg less vigorously.

  It can be inferred from paragraphs 4 and 5 that parent songbirds normally do not feed

  nestlings that are too weak to beg for food as vigorously as their nestmates

  more than one hungry nestling during a single visit to the nest

  offspring that were fed by the parents on the previous visit to the nest

  nestlings that have been removed and then later put back into their nest

  答案见下一页>>>>


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