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：tj资讯

North American bird population is declining. The decline is accelerating in regions associated with intensive agriculture.

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彼时，在一些地区，还存在贫困人口底数不清、扶贫对象不明、扶贫资金“天女散花”等问题，以致“年年扶贫年年贫”。

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