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Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.UK: 908,000赵王歇的心情很是矛盾，若是换了其他人还好，关键这李左车的身份敏感，而非兵法韬略都很有能耐，若是给他占据河东自立，分走了一部分的赵国兵力，以后再想要抑制可就不大容易了。讲述了农民工进城务工,其子女来城市接受教育,与城市里的孩子相互碰撞、理解、沟通,最终成为好朋友的动人故事。情景喜剧《家有儿女》是以一个重组家庭作为故事平台,演绎出不同的血缘、不同的年龄、不同的出生地、不同的性格的三个孩子和父母之间的故事,蕴藏着诸多的喜剧因素和戏剧冲突。《P-Valley》（前名Pussy Valley）由Katori Hall主创﹑Peter Chernin当执行制片，背景设定在密西西比一间脱衣舞俱乐部，这部南部剧将探索在当地俱乐部中形形色色的人。十个多月后，《白发魔女传》电视剧以其恢弘的制作、震撼的特效，再次让大众知道，武侠剧亦有新旧之分，原来的旧派武侠剧只能称为古装功夫剧，现在这种新武侠剧才是真正的武侠剧。