An ancient Greek philosopher once wrote that laughter is what makes us human—that it defines us as【T1】______. Much more recent d

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问题     An ancient Greek philosopher once wrote that laughter is what makes us human—that it defines us as【T1】______. Much more recent developments in biology and【T2】______ suggest that not only humans but also【T3】______ laugh: nonetheless, laughter is one of the most important aspects of human social life and【T4】______. Laughter starts very soon after【T5】______ —almost as soon as crying—and it serves many different【T6】______ functions, from sharing our joy to intimidating and insulting other people. In many parts of the world, making other people laugh is considered a great gift, and【T7】______ has always been a vital part of culture and art—perhaps precisely because of the complex, significant role of laughter in everyday life.
【T1】

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答案a species

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