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? Singleton pattern is the most common and simplest design pattern in design pattern, which ensures that only one instance exists in the program and can be accessed globally. For example, account information object management used in actual APP development? Objects (SQLiteOpenHelper) and so on all use singleton mode. This model has several advantages:Small rate told Youmei that he saw Xuancha and Yeon-hee at the seaside, but Youmei said he did not believe it. Koko heard the policeman and Yu Ying talking about Yishang. She was surprised and ran to the hospital. Taibai came to the ward with flowers and met Kezi. Yi Shang came home with Yu Ying after he was discharged from the hospital and said to Kezi that he would get married. Health told Yeon-hee Hyun to check the reasons for not being able to come to the wedding ceremony and the things that were robbed of the fitness center. Health came to President Park's office and warned him not to move his younger brother Hyun to check a hair.本茂心里有事啊。1949年的北京，国民党特务频繁作乱，一场大火烧掉了北平电车厂，让北京公共交通受损。战斗英雄出身的孙光大转业到公安局，与经验丰富但又一身坏习气的旧警察钱有根一起调查此案。在钱有根的帮助下，孙光大破获了一个一个重大的案件；孙光大帮助钱有根解救了赵春花，成立了家庭。钱有根的弟弟钱有财的死在孙光大、钱有根两人心中埋下化不开的误会。孙光大想解开这一切的误会、给钱有财平反，唯有抓住当事人张友一，可张友一异常的狡猾，数次逃过警察的搜捕。最后，孙光大终于抓住了张友一，钱有财的冤屈得到平反。钱有根经历一系列的波折，最终喜欢上了“对头”孙光大的儿子孙卫国，把孙卫国当成了自己的女婿、儿子，并把自己的破案绝学传授给孙卫国。孙光大和钱有根在国庆节的时候，终于把酒言欢、找回了兄弟情。5-second rule: After holding the ball, the player must throw the foul ball within 5 seconds, and FIBA rule stipulates that the free throw must also be shot within 5 seconds.