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　　Winona Ryder飾演Joyce，他的兒子就是那失蹤的小孩；David Harbour饰演帮助其寻找调查的警官。Cara Buono将饰演Karen，Mike和Nancy的母亲，这两个孩子也加入寻找失踪男孩的队伍中。Ross Partridge将饰演Lonnie，虽然与Joyce（Ryder饰）离婚但仍对此抱持不满的Joyce的前夫。Matthew Modine飾演Martin Brenner博士，聰明但背景神秘，或許跟兒童失蹤有關。Click "Close Block Editor" and click "Yes" in the pop-up dialog box to exit the "Block Editor".The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu哼，她就知道，要是张家三姑娘不在，秦旷会跑去街上瞧热闹？想了解什么，让随从跑一趟就是了，何必亲自去。Judging from the harmfulness and attack behavior of DDoS, we can divide DDoS attack methods into the following categories:人类围绕着最原始的欲望——住所和食物，爆发了席卷全世界的第三次世界大战。