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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.这时刚好一帮流氓前来找茬，胜浩起先远远地观望，但看到一帮人对其父亲痛下狠手时，终于忍不住上前出头.结果寡不敌众也被打了一顿，手机也被摔坏了.最后两人仓皇逃跑，巧妙藏身才逃过一劫，由此也成为了朋友.MP10-771-9P43-3AB1-A798但就在严世藩死后不久，一封家书竟然传到了苔湾。很多人对华语电影都是持悲观态度，觉得华夏也许能拍摄出不错的文艺片，但是在商业化电影方面，很难和国外大片相比。The fifth-year residents return for the first day of a year that will make or break their careers: Meredith faces the consequences of tampering with Derek's clinical trial and is terminated at the hospital; April tries to step up to the plate as Chief Resident in the wake of a giant sinkhole in the middle of Seattle; and Cristina and Owen are still at odds over their drastically different feelings for their unborn child.离开50年后，著名的巴黎裁缝兼变/装/皇/后回到了波兰的家乡，与女儿重建父女亲情。