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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For some UK concert-goers, the arena has given them opportunities for live music away in the north of England, instead of London.。关于这个话题，爱思助手下载最新版本提供了深入分析

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