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The second type of attack faced by classifiers involves opponents who try to poison your data to make your system behave wrongly.扬名世界的喜剧演员到家乡费城进行巡回演出，却被迫回答一个问题：为了守护他所拥有的一切，他愿意做到何种地步。As a reporter, I will use the power of news to continue the story of Kirgiz people protecting the border.正踌躇间，就有胡家下人惊慌来报，说朱雀将军带着爹娘嫂子，还有白虎将军的爷爷奶奶和娘，正聚集在胡家门口闹事呢，引得上万人观看，把一条景泰路都堵得严严实实。Factory, Builder, Factory Method, Prototype, Singleton, Facade, Adapter, Bridge, Composite, Decorator, Proxy, Command, Interpreter, Iterator, Mediator, Memoto, Observer, State, Strategy, Template MethodThe fourth step is to be responsible for the implementation of specific button events. After clicking the button, Context does not do any specific operations, but delegates the request to the current status class for execution:In real life, there are many requests that cannot be made by one person. For example, the salary at the interview may be decided by the technical manager if it is less than 10,000, but the salary between 10,000 and 15,000 may not be approved by the technical manager and may need to be approved by the technical director.