18-19岁macbookpro

At the end of these days, the yard is full of our achievements. Everyone is very happy. Ping Jie's brother suggested to have a bar for dinner. He also went to his cousin's house a few kilometers away to get two cans of rice wine made by himself. We also came to our strength and cooked our own food. Each of us showed his skill in cooking a dish. At the dinner table, a few glasses of wine went down and everyone talked a lot. (In fact, the degree of this wine is not low, ha ha.)Gao Yin, a leading figure in Korean literature　　一个我从未透露过的秘密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.2008年1月26日到2月5日，突如其来的寒潮使花城广州呈现一片北国风貌。数十万旅客滞留在广州火车站，故乡在召唤每一个游子的心。It is easier to design a command queue