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Next, I began to learn JDK & JAVA from October to improve my knowledge. Design Pattern is a summary of the experience of predecessors in code development and a series of routines to solve specific problems. It is not a syntax regulation, but a set of solutions to improve code reusability, maintainability, readability, robustness and security.我也会做针线，会做饭……正吹嘘着，就听外边有人叫娘，接着板栗和葫芦大步走进来。周菡心里嘀咕道，迟一些儿也没什么。The creepage distance is divided into two grades, and the creepage distance of 300V grade is ≥ 5 mm; Creepage distance of 600V grade ≥ 7mm. The creepage distance is designed for 220V voltage according to 300V grade, and the creepage distance is designed for 380V voltage according to 600V grade. For 220V and 380V high-power parts, character marks are applied to allow cuts in PCB design to meet the requirements of creepage distance.小小司机见证万千世态炎凉，四人家庭演绎都市感情传奇《大国建造》全片以“探寻建筑工程的奇迹”为主线，探秘新地标背后“中国制造、中国建造和中国创造”的奇迹。全片共6集，每集45分钟，以《极限挑战》《栋梁之材》《锤炼成器》《稳如磐石》《律动和合》《匠心巧思》，来揭秘新地标的建设故事。