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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We fixed an issue that prevented the Ctrl + Alt + Del shortcut from opening the end session dialog until Quick Settings had been opened. And end session dialogs now have the same background dimming and blur effects as password dialogs.

SpaceX据悉考虑

当然，还有24 个行业加大了研发投入力度——包括排名领跑的四大行业。其中，汽车制造业的表现尤为突出——在披露研发企业数量微增3%的情况下，研发投入同比增幅达到17.29%，排名也从上年第五跃至第三。