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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Older power stations have simply placed a grill across the inlet pipes, filtering out fish, which are killed in the process.。爱思助手下载最新版本对此有专业解读

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一名女子站在尖东大富豪夜总会外的街边（图：南方人物周刊记者 方迎忠）