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In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.他们身后跟着一男一女两个下人，各自挽着一个大包袱。Please click "Read the original text" in the lower left corner.郑氏微笑道：那是应当的。Haut Medoc-Upper Medoc, Bordeaux, FranceIn recent years, the names that have become lighter personally feel too sand sculpture.　　《练功》：50年代，一群拜师学艺的孩子在师父严厉的督导下勤练功夫。徒弟与师父间的默契在呼喝声中形成，而躲懒受罚的那天也可成为一生难忘的转机。