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Iterator mode: Pay attention to encapsulating changes in specific fields, support changes in collections, shield complex internal structures of collections objects, and provide transparent traversal of collections by client programs.Matrix metering: It is also called evaluation metering on Canon cameras. It metering the whole area of the picture. The exposure values of each area are averaged in the camera to obtain an average value, thus obtaining the correct exposure of the whole picture.At present, what methods do we take to solve the attack? The first method shortens the waiting time and deletes the illegal request data packets waiting in the waiting queue as soon as possible. The second method is that the first handshake message is not put into the waiting queue. We return a 32-bit unsigned integer to the client as the Seq of the second handshake. The integer is obtained by adding a serial number of the server to the parameters requested by the user (including the requested address, port, etc.). If it is a normal user, it adds 1 as ACK after receiving this integer and returns it to the server. After receiving the data, the server subtracts 1 from this ACK and then performs inverse operation to obtain various parameters. Finally, the data sent out are compared. If they are completely consistent, it means that it is an effective response and stored in the corresponding data structure, otherwise it is not. Through this method, illegal requests cannot occupy system resources.一九四九年，程瑞祥携妻林丽卿从内陆来港途中，因环境所迫卖妻，甚为后悔，惟有只身来港以拉车为生。六年后先后遇上赵大年与上海大亨车月亭，但在一次走私事件中，大年被充军帝汶岛，于是瑞祥肩负起抚养大年之子振鹏。因此事故，瑞祥得月亭之信任，委以要职，并与郑带好结婚。，脱离月亭自立门户，但在感情上起波折，舍带好并拒月亭二女沪生之爱，与前妻复合。七三年，丽卿病死，瑞祥事业出现危机，再向沪生追求，欲振事业，惟此举遭振鹏妒忌，大爆内幕，瑞祥众叛亲离，最后打回原形，郁郁而终。却不想将军只带走苏岸，却留下自己。　　四大版块《“乐”见新鲜》为新闻资讯；《“乐”见榜样》是榜样人物专题片；《“乐”暖人间》平凡人音乐故事的的Vlog展示；《越短“乐”精彩》是新鲜、正能量的短视频集锦。A few strands of the rubbed hair hung down and looked very embarrassed. Hit his hand off his head and looked at his uncontrollable trembling hand. He felt a little scared and could no longer control it. He wanted to open a portal to send himself to New York immediately. He just raised his hand but was stopped by Wang. Wang took his hand and shook his head at him. His reason was still there. He just watched quietly here and didn't do anything out of line.