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Defines an interface for creating objects, allowing subclasses to decide which class to instantiate. Factory methods delay the instantiation of a class to its subclasses."'How good is the effect very good'?" I asked.Looking back on this social practice, I have learned a lot, learned a lot of social experience from everyone I contact, and improved my potential, which I cannot learn in school. It takes long-term practice to be good at communicating with others in society. In the past, I did not have the opportunity to work, which made me unable to adapt to changes when talking with others and made the conversation silent. This was very embarrassing. People will integrate into the social group in the society, and people will work together to make the process of doing things more harmonious and get twice the result with half the effort. You should listen to the opinions given to you by others and understand them patiently and modestly. Be confident in your work. Confidence is not a numb boast, but an affirmation of one's potential. Lack of social experience, lack of academic qualifications and other reasons will make self-confidence lack. In fact, anyone who is born with confidence can overcome psychological barriers and everything will become easy to solve. The accumulation of knowledge is also very important. Knowledge is like human blood. Without blood, one's body will weaken, and without knowledge, one's mind will dry up. The brewing industry contacted this time is very strange to me. If I want to do a good job, I must understand this knowledge and have in-depth understanding of all aspects so as to better apply it to my work.没准我能帮你参详参详。穿越了，也有了一个系统，但林锋压力山大。系统主线任务：林锋开山立派，建立史上第一大宗门，林锋本人成为第一祖师。于是为了成为史上第一祖师爷，林锋开始奋斗。郑氏听一双儿女议论这样那样，听了一会，摆手道：你俩别犯了职业毛病，把咱家当军营来管了。The most basic defense at the network layer is RFC? 2827 [3]. Using input source filtering, ISP refuses to route a packet whose source IP address does not belong to its source subnet further. Input source filtering can effectively prevent SYN flooding attacks disguised as IP. However, this method is useless at present because it is difficult to deploy on a large scale. Moreover, input source filtering cannot resist distributed attacks.