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：dev资讯

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2. 电车下沉与小镇青年的“双向奔赴”从上述多位车友的描述中不难发现，他们不约而同选择开着电车回乡或出游的原因很简单，无非是成本更低、补能不再有焦虑，智能驾驶大大缓解了自己的驾驶疲劳。

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