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正是因此北方出现了这样的形势，尹旭才想要尽快想办法解决中原之战。8. Where, for any sufficient reason, it is impossible for the towed ship or object to display the lights or types specified in paragraphs 5 or 7 of this Article, all possible measures shall be taken to make the towed ship or object have lights on it, or at least to indicate the existence of such ship or object.Let me explain the role of these classes: MySubject class is our main object, Observer1 and Observer2 are objects that depend on MySubject, and Observer1 and Observer2 must change when MySubject changes. The AbstractSubject class defines a list of objects to be monitored, which can be modified: add or delete monitored objects, and when MySubject changes, it is responsible for notifying the objects that exist in the list. Let's look at the implementation code:哈佛大学宗教符号学教授罗伯特·兰登（汤姆·汉克斯饰演）到巴黎公干期间突然接到通知罗浮宫馆长遭人谋杀，而在博物馆内，尸体旁边留下了一个令人困惑的密码。兰顿教授与法国美女密码专家苏菲（柯德莉·塔图饰演）在整理分析谜团的过程中，惊讶地发现在达芬奇的作品中藏有一连串令人震惊的线索。这些线索人人可见，却被画家巧妙地伪装，加以隐藏。永平帝奇怪地问：孔雀王还有何事要奏？孔雀王道：两年前，玄武候送小女回南雀国时，曾在两军阵前发下重誓：要二次擒拿小女，并纳她为妾。Qiao RenliangYou can tell me first