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那个冒出杂音的正是一脸漠然的班主任，程雪菲觉得尊严受到亵渎，还是保持高姿态的笑笑：今天墨老师是主宾，你有什么重要的事情请推一下吧。Phase C Metering Section10% have ideals and have made short-term plans.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.---很大程度是因为它的免费。Another way to save iptables rules is to use the iptables-save command