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In this time of gold, three silver and four silver, a friend suddenly solemnly asked me the startup mode and specific application mode of Activity. I also think yes, Ping didn't pay much attention to the result and got stuck at the critical moment. I feel that I should prepare for a rainy day and make a record:Taking the opportunity of this year's Qingming Festival, let's talk about the usual process of death. Fully understanding and understanding this process can sometimes help you identify when the people you love begin to reach the end of life, better carry out hospice care, prepare for their funeral, and leave no regret of "children want to support but relatives do not stay". At the same time, identifying irreversible death can also avoid unnecessary medical intervention and the ordeal it brings to loved ones.胡钧张张嘴，一句话也说不出。长帆还没走，我怎么走？儿孙自有儿孙福，走吧。在晴朗明媚的一天，羊村正举行防御系统揭幕仪式，这是慢羊羊村长的最新发明，该系统可以抵制上千伏的电压。谁知这时灰太狼突然出现搅局，不久前他发明了羊味罐头，由此成为当今最炙手可热的科学家，可是没能抓到小羊依然是他心中隐隐的伤痛。灰太狼操纵天气控制器与羊羊特工队展开殊死搏斗。受伤的喜羊羊偶然结识了熊猫旺财，而对方的真实身份是灭绝了许久的蛇。受挫的灰太狼专心升级天气控制器，却忽略了老婆和灰灰的感受，而他的失误也导致天气控制器失控。危难时刻，青青草原的各位意外发现久远以前蛇族发明的诺亚神舟。可是为了启动神舟，必须得到蛇族的帮助。为此，羊羊特工队和机械喜羊羊踏上凶险莫测的冒险旅程……Skin patterns are designed to resolve dependencies between classes and class homes, Like spring, the relationship between classes can be configured into the configuration file, while the appearance mode is to put their relationship in a Facade class, which reduces the coupling degree between classes. There is no interface involved in this mode. Look at the following class diagram: (Let's take the startup process of a computer as an example)