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:cd资讯

It is the first time researchers have drawn a direct link between a known piece of space debris crashing to Earth and pollution levels.

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Эксперт посоветовал по умолчанию начинать коммуникацию на «вы» с большой буквы, особенно если человек старше или выше по должности. Если позволит ситуация, в дальнейшем можно договориться об удобном для обоих собеседников общении.

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