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In essence, classification is to find the common points and differences of things in our thoughts. It is the basic method and ability for us to know and understand the world. On the basis of classification, it is possible to judge and reason, and to form concepts and make decisions. Classification requires comprehensive demonstration activities such as association, analogy, reasoning and extension, and is the basic cell of thinking.这一点众人深有体会，确实存在有时候搞不清楚将士身份，难以下发抚恤的情况，从而亏待了烈士的家属。太阳突然开始杀死它照耀的一切,从布鲁塞尔起飞的一个夜间航班上的乘客竭力求生。However, this is not the case. Plants also have sex and love. Until modern times, the secret of plant reproduction was completely uncovered. In the long process of evolution, they really exhausted their skills in order to survive.(1). Not set各自心中怀揣着对“婚姻”的定义，电视台编导谢晓骏和公关公司女白领吴越，在相识只有五个月时走进了围城，试图寻找婚姻的终极答案。1. Download Aisi Assistant and itunes