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：steel资讯

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知道海明威怎么写《老人与海》吗？他每天停笔时，故意不写完一句话，就写半句，留半句。为什么？这样第二天早上，他就有个现成的开头可以接着写，灵感不会断片。他太懂怎么对付那个完美主义小鬼了。