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：nn资讯

Marketer Plan: $99/year – that can be used on upto 2 sites

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Hard difficulty hints, answers for Feb. 26 PipsNumber (10): Everything in this space must add up to 10. The answer is 4-2, placed vertically; 6-0, placed horizontally.，推荐阅读搜狗输入法2026获取更多信息

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