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反正，我和杨长帆，是做不成朋友了。The research on classification ability is more in kindergartens and more in primary schools. Research by cognitive psychologists has found that children under 0-1 years old basically have no classification ability, and they mainly rely on individual perception. The classification ability of children aged 1-3 has begun to sprout, but the concept of "category" has not yet formed. The classification of children aged 3-5 is basically still based on external perceptible dimensions such as shape and color. For example, children in small classes in kindergartens are asked to classify red plastic balls, red apples and bananas. They will divide the balls and apples together, either according to the shape (circle) or according to the color (red), but they will not put apple kernel bananas together according to the function (edible). What if you add another celery?众人也都急忙摇手。我就是这幅字的作者，季木霖。　　SD集团总裁顾灏轩因为自己家的宠物狗，三番四次结缘宠物乐园实习生程荇荇。在小狗“布鲁托”的一次次神助攻下，顾灏轩慢慢喜欢上了这个飒爽的女孩，且看宠物乐园实习生如何逆风翻盘成为总裁的心尖宝！ALTER DATABASE SSDB SET MULTI_USER