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再次，就只能从平民中选了。一名年轻的士卒听到这条骇人的命令，不由的驻足沉思：项羽不是鲁莽之人，这样做是为了什么？他的眼光不由的落到滔滔漳水之战，大河在身后，没了船只就再无退路。范金的剑刚刚出鞘，范鄂林就飞快地行动了，范金胸口上多了一道伤口。Weng Siliang informed the buyer that he had called in more than a dozen Indonesian sailors to take over the "Changsheng Wheel", while the 18 gangsters returned to the mainland of China on the receiving ship.One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.DDOS is not an attack, but a general term for a large category of attacks. There are dozens of types of it, and new attack methods are still being invented. Every link of website operation can be the target of attack. As long as one link is breached and the whole process cannot run, the purpose of paralyzing the service is achieved.