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Lower mountingIn 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.Then this platform really turned into dead thunder. Because the person in charge of the platform can no longer be caught.《乡村爱情变奏曲》将继续沿承诙谐、幽默、轻松、自然的轻喜剧特点，用真实、本色的表演讲述那些在象牙山村里发生的大事小情、家长里短、恩恩怨怨、是是非非。刘能、赵四、长贵、谢广坤、王老七这几位庄户地里的“能人”在成功的抱上了第三代以后，又因为面子、攀比、小气、人情产生了很多故事；那些不让爹妈省心的年轻人王小蒙、谢永强、刘英、赵玉田、王天来、苏玉红事业已经越做越大，但关于恋爱、婚姻、生娃等让观众啼笑皆非的矛盾仍然存在；再婚的谢大脚、王云还要直面“婚姻的危机”；刘大脑袋的象牙山庄又一次扩大规模并且要把王大拿排挤在外，因此王大拿想了很多有意思的办法……各种故事每天在上演。4. There are no new varieties of lobsters at present, but crayfish grow differently in different regions. Shrimps are generally imported from the local area. In this way, lobsters do not undergo long-distance transportation, but also adapt to the local geographical conditions and are easy to survive. Where did the seedlings come from? Many people asked for seedlings online. First of all, do you have crayfish in your area? I don't think anyone who wants to raise lobsters now will say that there is no local one, If so, there will be crayfish collectors in the area. From April to May, the number of wild crayfish is very large, Find a shrimp dealer in the street, Let them help you collect, you can choose small specifications, so the price is cheap, small specifications dealers generally can't sell a good price, generally can buy around 5 yuan, of course, this depends on the local actual situation, if there is no local crayfish, shrimp seedlings are not in demand and worthless, more breeding is a little more popular. It is also easy to collect tens of hundreds of catties every morning, Generally, a kilo of 50-200 tails is good, On the same day, it will be transported back to the pond after simple disinfection. It will put about 100kg per mu. After putting it in, it will usually die. Dead shrimps will often be salvaged. Remember to repair the seedlings if you die. No matter whether you bought it from other places or someone else's pond, you will always die if you put it back. If you buy it locally, the price will be low and the cost of dying will not increase much.