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让他进来。System.out.println ("start the computer! ");帰れない 片岡鶴太郎 立石凉子UDP唐王沉迷五行星象之术，册封道人天机子为国师，天机子却在进京途中遇刺身亡。这一案件牵出了当朝相国和江湖组织“天网宗”两大势力和一场篡位夺权的巨大阴谋。靳胜男、罗重楼等英雄侠士将如何力挽狂澜惩奸除恶？2. The registerForm.onsubmit function lacks flexibility. If we add a new validation rule or want to change the length validation of passwords from 6 to 8, we must change the code inside the registerForm.onsubmit function. Violating the open-closed principle.Similar to the development of children from appearance and color to older children, they can be classified according to concepts. For example, if they know the concept of "food", no matter what kind of vegetables they look like, they should be classified into one category. The classification of biology has also developed in this way. The earliest method is to identify and distinguish species according to phenotypic characteristics, and to classify them step by step according to the degree of phenotypic similarity, so as to establish a classification system that is easy to retrieve. This is the principle of phenotypic classification. However, the problem of phenotypic classification is that it is difficult to reveal the essential laws of things. Many creatures with very different shapes may have kinship relationships. For example, the online sentence "When I knew sunflowers belonged to Compositae, I collapsed" is what it means.