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BeforeUdpCreate Implementation of ResourceManager(未完待续……) show_style();。The path is shown in the following figure:D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:《新青年》横跨1907年至1927年20年中国历史，讲述江流（朱亚文 饰）、魏国（蒋恺 饰）、王应（齐奎 饰）、周鲁（刘向京 饰）等一群自强不息、敢于担当的新青年，为人民谋求福祉、为国家探索理想、为民族找寻出路而矢志不渝、百折不回的曲折历程。2. It is suggested that the members of the Party Committee of the Group Company should take more practical actions to go deep into the grass-roots level so as to effectively understand and solve the practical difficulties and problems in the grass-roots work.Sockstress is different from the previous flood attacks. This attack does not need to send a large amount of attack traffic in a short period of time. This attack is a slow attack.