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.

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但我会去捉蚂蚱。太阳底下脸晒得通红,屏气,迅速出击,用狗尾巴草把蚂蚱绑起来;再从家里偷油出来,把健力宝罐子的底部当“锅”,罐子掏个洞,点上蜡烛——一个灶台搭建完成。和小伙伴们围在一块儿,炸蚂蚱吃,小时候觉得嘎嘎香,长大之后却再也不敢碰了。

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This decision seems to be one of the more hotly-contested among ergo enthusiasts. A conventional keyboard has staggered keys, with each row slightly offset to the rows above and below it — so the A key is about halfway between the Q and W above it. This is a holdover from vintage mechanical typewriters, in which each press activated a hammer that smashed ink onto paper in the shape of a letter. To fit the hammers as close together as possible, while still allowing for finger pads, the keys were staggered.