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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?一进船舱，范依兰亭亭施礼。嬴子夜只能够暂时在心中这样认定。民国初年，北方桐城县，阔别家乡四年的展家长子展云飞在归途中，与萧家大女雨凤结识，从此两人魂牵梦萦，两情缱绻。展家次子展云翔向来与兄不睦，加之其妻天虹少女时期就对云飞充满仰慕且一直将真情掩藏，更使云翔嫉恨云飞。为泄心头之恨，云翔在向萧家索债不成时，竟一把火将萧家的“寄傲山庄”化为灰烬，致使萧父葬身火海，萧家五姐弟流落街头。这论讲是论不下去了，都论到他身上来了，实在让他气闷不已。