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GRE阅读文章类型:新观点阐述

2017-10-02 11:51:00 来源:网络GRE资料下载

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  “1+2”模式

  这种模式省去了作者对于新观点所做的评价。这类文章的常见写法是第一句用一个过去的时间引出一个老观点,接下来发生一次句间取反,引出新观点。之后针对新观点进行一些列的阐述。对于这种模式,文章的主旨就是新观点。

  对应文章:对应文章:GWC-R23

  模式:

  Many researchers attribute the large number of physiological and behavioral similarities between birds and mammals, which have separate evolutionary histories, to endothermy (a thermoregulatory strategy whereby warm body temperature is maintained through internal heat sources). However, Farmer argues that parental care rather than endothermy is the key to understanding the similarities between mammals and birds. According to Farmer, while endothermy provides an explanation for a few similarities, such as the presence of body insulation, endothermy is just one characteristic among many related to parental care. The two purported advantages of endothermy that have been most frequently cited by researchers are an expanded range of inhabitable environments and the ability to sustain vigorous exercise. But metabolism has to increase substantially (at great energy cost) therefore conferring any significant thermoregulatory advantage in terms of the former, and there is no causal biological linkage to explain why endothermy would be essential to sustain exercise. Farmer argues instead that endothermy evolved as a means to control incubation temperature and that the ability to sustain exercise evolved separately, as a means to improve a parent’s ability to forage and provision its young.

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