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(2) A ship towed by side shall display one tail light and two side lights at the front.小葱笑眯眯地朝他伸手，问道：红包哩？玉米大叫：我也要。　　Matt将对自己对Sylar所做的行为感到愧疚, 他想回到妻子和孩子的身边, 但一切都很艰难.No rush. He was disqualified from the competition three times.柯南立刻利用追踪眼镜的望远镜功能，沿着弹道发现了一个黑色的身影。“从那么远的距离进行狙击，怎么可能？！”柯南马上与女高中生侦探世良真纯乘坐摩托车追赶逃走的狙击手，意想不到的是狙击手居然连警察的巡逻车都打算一起炸掉，整个追踪过程都被其玩弄于股掌之中。结果，这场激烈的追踪将FBI也卷入其中，犯人以及狙击事件的谜团都消失在了大海里。Visitor mode is to encapsulate some operations applied to a certain data structure. Once these operations need to be modified, the data structure that accepts this operation can be saved unchanged. Visitor mode is suitable for systems with relatively stable data structures. It reduces the coupling degree between data structures and operations acting on data structures, making the set of operations relatively free to change. The specific structure diagram is as follows:　　版本二