Big Ben is not the name of a man. It's the name of a big clock in London. This clock has four faces. So, no matter(无论)where you stand, you can read the time on the face of Big Ben. Each face is the size of a bus. The hands are about four metres long. If you go to London, you may want to visit the Houses of Parliament(英国国会大厦). In that place you will find Big Ben sits at the top of the clock tower in the Houses of Parliament. You will probably hear it and see it. The big clock makes such a loud noise. It goes every quarter of an hour. Big Ben has been the most famous symbol(标志)of  London

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                                                                                      次北固山下
                                                                                          王湾
                                                                      客路青山外，行舟绿水前。
                                                                     潮平两岸阔，风正一帆悬。
                                                                     海日生残夜，江春入旧年。
                                                                    乡书何处达？归雁洛阳边。

1917年11月7日晚，“阿芙乐尔”号巡洋舰发出向敌人最后攻击的炮声，赤卫队员、革命士兵和水兵的队伍从四面八方冲向冬宫。随后，世界上第一个社会主义国家诞生。这一事件是（    ）