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This is the basis of the opening and closing principle, and the specific content: interface-oriented programming, relying on abstraction rather than concreteness. When a specific class is used when writing code, it does not interact with the specific class, but interacts with the upper interface of the specific class.贾伊、拉瓦和库萨是三胞胎，但个性迥异。拉瓦是好心的放贷银行经理，库萨善良而狡猾，贾伊则是最危险的坏蛋。故事讲述了三兄弟的传奇……Business Strategy and Business Plan (STEP 5): Good business design requires careful business planning before it can be implemented. The planning team shall formulate a detailed business plan for each market segment and output the product development plan for each market segment. Then, the business plan and product development plan for all market segments shall be integrated into the business plan and product signpost plan of the product line, and the demand for human resources and key technologies of the product line shall be output at the same time.Awakening Skills樊哙心知肚明，这下沛公又欠下尹旭一个人情。《蜀山奇侠之仙侣奇缘》是《蜀山奇侠》的续集。本剧根据还珠楼主的《蜀山剑侠传》部分内容改编，由萧笙监制，郑伊健、陈松伶领衔主演。