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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.8. Stranded ships shall strike the bell horn specified in paragraph 7 of this Article, and if required, the gong horn specified in that paragraph shall be added. In addition, the bell should be struck three times separately and clearly immediately before and after the emergency bell. Stranded ships can also sound appropriate horns.3. Fines. If the employing unit still does not reissue the wages or compensation owed to the employees within the time limit of the labor and social security administrative department, the labor and social security administrative department may, according to the circumstances, impose a fine of 2-5 times the amount owed for each person.TelecommunicationsUpdated 5 February公元前73年，来自古罗马利比亚省的奴隶斯巴达克斯（柯克•道格拉斯 Kirk Douglas 饰）在加普亚格斗学校中爱上了女奴瓦瑞妮娅（琼•西蒙斯 Jean Simmons 饰）。同年，格斗学校的奴隶在斯巴达克斯带领下发动起义，获得自由，随后斯巴达克斯与瓦瑞妮娅团聚，结为夫妇。起义震惊了罗马的统治集团，激化了元老院中贵族派和平民派的矛盾。贵族将领克拉苏（劳伦斯•奥利维尔 Laurence Olivier 饰）乘机击败平民派首领格拉古（查尔斯•劳顿 Charles Laughton 饰），篡夺了首席执政官的权力，实行独裁。格拉古为了打击克拉苏，打算私下放走奴隶大军；克拉苏却重金收买了海盗，并召回在国外作战的两支大军。斯巴达克斯起义军三面受敌，寡不抵众，数万奴隶战死，他与妻子和六千幸存战友均被克拉苏所俘。在最后的关头，由于格拉古的帮助，情况又发生了变化。