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Hello, first of all, thank you for your support to China Telecom. According to your description, the telecom version M3 can be used, and your M3W is the Unicom version, which can only be used by Unicom and Mobile, and cannot be used by Telecom.　　张槐和郑氏大吃一惊，急问道：怎么回事？大苞谷一边扯着爹坐下，又示意娘也坐回去，然后一五一十说了起来……再说板栗，在书房见到头发散乱、面目憔悴的田遥，不禁怔住，诧异地问道：田大人，你这是怎么了？田遥木然道：我想见红椒。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.又接到了项羽从彭城送来的书信，表示会默许他们的一些做法，鼓动他们进攻越国。　　与此同时，前来“多一个”县城上任新官县令的书生，无意中和包三姑拿错包袱，丢失官印。两人结伴前往衙门报案，发现包袱是被女盗贼杨八妹偷走，而杨八妹正女扮男装冒充新县令。项羽若有所思道：是啊。