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The combination mode is also called part-to-whole mode. The combination mode combines objects into a tree structure, which is used to represent the relationship between the whole and the part. The combination mode enables clients to treat individual objects and combined objects equally. For example, in. NET, simple controls such as WinForm controls, TextBox and Label inherit from the Control class, while composite controls such as GroupBox also inherit from the Control class. The specific structure diagram of the combination mode is shown below.1942年4月19日，国军飞虎队飞行员保罗·韦恩与机械师董子晨驾战机从国统区浙江衢州机场起飞奔赴昆明，二人此行肩负着“瓦图拉”计划的惊天机密，将对西南战场即将打响的滇缅公路保卫战起到扭转战局的巨大作用。然而被严格保密的“瓦图拉”计划还是被日军提前获取，保罗与董子晨的飞机一起飞即遭日军战机拦截，飞机被劫持至日本占领区安徽无为县上空击落，携带机密的保罗与董子晨被迫跳伞逃生，日军大佐矶谷猪三郎却早已奉命张网以待。保罗与董子晨在乡亲和新四军游击队的冒死接力救援下度过落地后的生死3小时，精心布置本以为万无一失的猪三郎几乎全歼了新四军游击队，仍然没能擒获飞行员，从无败绩的猪三郎自残立誓，加紧了追捕飞行员的脚步。Shandong Province　　讲述了村民李鲜花意外当选天马山村村主任后，直面困难，勇挑重担，带领村民们阔步向前的故事。强健的体魄，挺拔昂扬，气拔山兮气盖世，隐约间流出慑人的气魄。当下周夫人在上首坐了，又请板栗也坐下，然后一长一短地问他话，在寺里情形等。A) Use simpler object-oriented languages such as Java, C #. GoF's [design pattern] is essentially an object-oriented design pattern. [GoF · 1.1] mentioned that "the choice of programming language is very important, which will affect the starting point of people's understanding of the problem". From the perspective of learning design patterns, Java and C # are easier than C + +. Such as Java interfaces, can more effectively show the intention of design patterns.