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Structural patterns, as the name implies, discuss the structure of classes and objects and are mainly used to deal with the combination of classes or objects. It includes two types, one is class structure pattern, which refers to the combination of interfaces or implementations by inheritance mechanism. The second is the object structure mode, which refers to the realization of new functions by combining objects. It includes adapter mode, bridge mode, decorator mode, combination mode, appearance mode, element mode and agent mode.汪魁大声道：真的？那黎兄弟你往后可要多做些给我们吃。(four) more than one registered fire engineer and more than five personnel with fire extinguisher maintenance skills;龙陵中共地下党负责人、抗日游击队政委蔡凤琴，奉滇西特委指示，掩护、配合代号“蝴蝶”的重庆特工沈丽萍查找日军情报机构“芒市一号”。沈丽萍在蔡凤琴掩护下，以中医世家身份为掩护，借给岛田治眩晕病机会，赢得岛田信任。Generating light drawing files according to GERBER format, including copper foil patterns, silk screen patterns, solder mask patterns, hole positions and external dimension patterns of component surfaces and soldering surfaces; Generate NC drilling files required by manufacturers. Provide disk files and print samples.3.14"What was your first reaction when you saw these flying insects?" Asked