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The domestic reflection servers that were used to launch NTP reflection attacks this month ranked TOP30 according to the number of attacks launched by use and their attribution are shown in Table 3, with the largest addresses located in Jilin Province and Beijing City.现如今尹旭对他秦国残余势力，对赢子夜而言都有着无比重要的地位与意义，所以安全上绝对不容有失。Coveting inferior clothes and being cheap, I threw them away without wearing them several times.这婚姻，据我看，必得像攒家业一样，除了要奋力拼搏和积攒，还得努力保护周全，才能累起丰厚的家资。For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.