This passage is most probably taken from a . The last paragraph is about .

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问题 This passage is most probably taken from a ______.
The last paragraph is about ______.

选项 A、the senses of birds
B、the classification of birds
C、the evolution of birds
D、the characteristic of birds

答案B

解析本题为段落主旨题。本段先讲了早期的鸟类分类标准，又介绍了新的科学分类标准——系谱分类，其中关键词"classification"多次出现，因此选D。

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大学英语三级A级

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