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3. Refactoring code using policy modeThe 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?该剧讲述为了跻身上流社会而堵上人生、奋力奔走的女主的欲望和母性，以及置业暴富的成功故事。）……(未完待续。范增听到之后不住摇头道：羽儿，你想想咸、阳何以会突然出现这‘富贵不还乡，如锦衣夜行的歌谣？显然这是有人故意而为之，就是不想你待在关中之地，不可中计啊。当兽医小哥哥想要买醉的时候遇到了一个暖心的调酒师，他们到底有发生关系吗？这个情人节有我陪伴你！