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2. After shutting down, hold down the HOME key to keep it still, connect the data cable to the computer, and release the HOME key.非常識宴会 石黒賢 河原さぶ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.SYN Agent:相比捧花青年，陈启看上去无疑寒酸得多，且不说实在没有可比性的自行车，陈启身上衣服也都是些普通货，一身行头加起来绝对不会超过五百块。探险家山河等7人受邀参加了本次的探险活动。Self-imported SFC