Where do you think is the passage from? Which can be inferred from the passage?

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问题 Where do you think is the passage from?
Which can be inferred from the passage?

选项 A、Mammals developed from the reptiles.
B、The animals that are hatched from eggs have no opportunity for learning.
C、Mammals developed at the cost of the extinction of reptiles.
D、Not all the primates are mammals.

答案A

解析 推断题。根据第一段第三句“Mammals have a number of features that distinguish them from the reptiles from which they developed.”可判断,A正确。
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