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Bring the CA certificate (if not, not), business handling information and expenses (cash only) to Jiangsu CA outlets for handling (see below for details).The sourceable interface's first Sub1!听我说完啊。* ` 3 w 'f; M\ '@After understanding the history and classification of design patterns, how should we learn design patterns? Before learning the design pattern, readers must establish a kind of consciousness, that is, the design pattern is not only a method and technology, but also an idea and a methodology. It has nothing to do with the specific language. The main purpose of learning design patterns is to establish object-oriented ideas, program to the interface as much as possible, with low coupling and high cohesion, so that the programs you design can be reused as much as possible. "Specious. Learning design patterns can better understand object-oriented ideas. Design patterns are some design skills and tricks. Don't rise to ideas and methodologies, okay?"像万元，他爹死了。