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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?One day in April 2014, he and another young man went on a mountain tour together. When he found four suspicious targets suspected of illegally crossing the border in the dim light of night, he asked another young man to go down the mountain to inform the villagers that he would risk stepping forward and strike up a conversation with them to delay the time. Who knew the other party was very cunning, aware that he was a border guard, he pulled out a machete more than one meter long and cut off his arm with one knife. He told me that it was worth the arrest of the four criminals with one arm.他还是好心了。Next, try another method, that is, use the following delegate function to complete the writing of this state machine. This is an example of object-oriented design. The former saves variables as attributes of objects, while the latter encloses variables in the environment formed by closures:作为捕手和击球手的走一郎非常的活跃。而投马由于某些原因而担任三垒手，却拥有着作为投手的才能。走一郎的亲妹妹同时也是投马无血缘关系的义妹·立花音美也进入了初中，三人之间的氛围也发生了一些变化。環(リング) 黒木瞳 小木茂光