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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.自纽约事件以来，托尼·斯塔克（小罗伯特·唐尼 Robert Downey Jr. 饰）为前所未有的焦虑症所困扰。他疯狂投入钢铁侠升级版的研发，为此废寝忘食，甚至忽略了女友佩珀·波茨（格温妮斯·帕特洛 Gwyneth Paltrow 饰）的感受。与此同时，臭名昭著的恐怖头目曼达林（本·金斯利 Ben Kingsley 饰）制造了一连串的爆炸袭击事件，托尼当年最忠诚的保镖即在最近的一次袭击中身负重伤。未过多久，托尼、佩珀以及曾与他有过一面之缘的女植物学家玛雅（丽贝卡·豪尔 Rebecca Hall 饰）在家中遭到猛烈的炮火袭击，几乎丧命，而这一切似乎都与22年前那名偶然邂逅的科学家阿尔德里奇·基连（盖·皮尔斯 Guy Pearce 饰）及其终极生物的研究有关。可是，红椒和黄豆却带着几个小的在院外林子里玩雪，因为院内的雪都铲出来了。在一次偶然中，苏拉认识了年轻有为的CEO邱石（陆毅 饰），邱石被苏拉的气质吸引，他对苏拉百般追求，苏拉却无心恋爱，只把精力全部投进事业中。Grandpa said that he had never felt lonely since they fell in love. Grandma said that Grandpa always cared for her like a child.当然这都建立在断水锋利剑刃基础上，真的要好好谢谢范依兰，美人所赠宝剑已经多次救命于危难。The-F option means flush, that is, flushing the specified chain, that is, deleting all rules in the specified chain. However, note that this operation is equivalent to a deletion operation and should be used with caution when iptables rules are not saved.