题目

What sets human beings apart from animals is not the pursuit of happiness, but the pursuit of meaning, ________ is unique to humans. 答案：which　句意：不是对幸福的追求而是对生命意义的追求才使得人类与动物不同，这是人类独有的特征。which引导非限制性定语从句，修饰前面整句话的内容。

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