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神秘机构出现在平凡的社恐女孩“池小鱼”手机APP里，下单点人设就像叫外卖一样轻松！池小鱼为了完成工作使用人设外卖，却意外向霸道总裁发起了攻势，且频频得手，引得霸总堕入情网！就在池小鱼准备告别母胎单身之时，霸总苏扬的人生赢家人设竟然崩塌了！　　12年前，在与邻国·巴尔特兰帝国之间的战争中失去母亲的玛法姆特，那帮窝囊废就是不出兵。This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows:Disadvantages: NaggingIn the past two years, the educational policy inclined to the direction of quality education has impacted on the examination-oriented counseling and training of mathematics and other disciplines, forcing some K12 discipline training institutions to begin to lay out the direction of quality education and explore the way of discipline quality education. For example, subject counseling agencies such as Learning and Thinking, New Oriental and Elite Education, with a keen sense of smell, have begun to work hard on the cultivation of children's thinking ability at an early stage.