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：ship资讯

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After nine months in space, Nasa astronauts Butch Wilmore and Suni Williams have finally arrived back on Earth.。业内人士推荐im钱包官方下载作为进阶阅读

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How did Nasa's Suni and Butch fill nine months in space?，详情可参考safew官方版本下载

Under US President Donald Trump it is expected to be "full speed ahead" for regulatory approval, says Scott Wagner, head of the antitrust practice at the law firm Bilzin Sumberg.

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