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Creative patterns are patterns used to create objects, abstracting the instantiation process. All creative patterns have two things in common. First, they all encapsulate the specific types of information used by the system. Second, they hide how instances of these classes are created and organized. Creative patterns include singleton patterns, factory method patterns, abstract factory patterns, builder patterns and prototype patterns.Add a method called set_number_served (), which allows you to set the number of people to eat. Call this method and pass a value to it, then print the value again.Cancer death is caused by surgery (including chemotherapy and radiotherapy), but medicine has shifted the responsibility to the disease-cancer. No one has debunked the mistake of calling the operation excision. Because, the operation can only remove visible cancer lesions, but cannot remove the cause of cancer. Since the cause can be relapsed without removal, and the physical condition at the time of relapse is even worse, because it has been destroyed by surgery, the disease resistance has been greatly weakened. It can be seen that calling it "root removal" is an obvious deception. The concept of "excision" is not without market factors-in order to attract patients. If medicine is a science, science cannot be fake. But now this "surgical root removal" is an obvious fake!Tmall 618 's victory in the first battle gave Wang Bo great confidence. He said that in the next three years, he would slow down the speed of opening stores and embrace new retail in an all-round way, "from horizontal expansion to vertical expansion", that is, to increase the overall turnover of the company by increasing the performance of single stores.A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.这样的话，就能够收拢残兵，组织起防线与项羽周旋对峙。　　一個堂堂正正的男人，卻讓他三叩九拜。