Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

· · 来源：kr资讯

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drop-newest: Discards incoming data when full. Useful when you want to process what you have without being overwhelmed.。业内人士推荐im钱包官方下载作为进阶阅读

Ben Birchall/PA Wire

災後重建難題待解

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