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最近，在100的河姆渡氏族公社遗址发现了烧焦的羚羊骨残片，这证明人类在很早的时候就掌握了取火煮食肉类的技术。上述推论中隐含着下列哪项假设? A．从河姆渡公社以来的所有人种都掌握了取火的技术。 B．河姆渡人不生食羚羊肉。 C．只要发现烧焦的羚羊骨就能证明早期人类曾聚居于此。 D．河姆渡人以羚羊肉为主食。 E．羚羊骨是被人类取火烧焦的。
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