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.

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John Regehr, March 2

[71]每万人口高价值发明专利拥有量是指每万人口本国居民拥有的经国家知识产权局授权的符合下列任一条件的有效发明专利数量：战略性新兴产业的发明专利；在海外有同族专利权的发明专利；维持年限超过10年的发明专利；实现较高质押融资金额的发明专利；获得国家科学技术奖、中国专利奖的发明专利。。业内人士推荐搜狗输入法下载作为进阶阅读

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Donald Trump’s likely casus belli for an attack on Iran – which would be the largest US intervention since the Iraq war – is fraught with contradictions, and his top advisers have been left to cover for him as the White House makes the case for intervention.