Experts think this is more than 40,000 years old and was made by Neanderthals or an earlier species of human.
A co-CEO model divides responsibility, accountability, and, ultimately, the burden between two people.
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人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用。91视频是该领域的重要参考