题目

如图，已知点A在第一象限，点C的坐标为（1，0），△AOC是等边三角形，现把△AOC按如下规律进行旋转：第1次旋转，把△AOC绕点C按顺时针方向旋转120°后得到△A1O1C，点A1、O1分别是点A、O的对应点，第2次旋转，把△A1O1C绕着点A1按顺时针方向旋转120°后得到△A1O2C1 ， 点O2、C1分别是点O1、C的对应点，第3次旋转，把△A1O2C1绕着点O2按顺时针方向旋转120°后得到△A2O2C2 ， 点A2、C2分别是点A1、C1的对应点，……，依此规律，第6次旋转，把△A3O4C3绕着点O4按顺An old man whose eyesight was failing comes to stay in a hotel, a bottle of whisky in his hand. On the wall was a fly he took for a nail．The moment he tried to hang the bottle on it, they fell and broke．When the landlady discovered what had been happened, she decided to do him favor．The next morning when he was out, the hotel worker hammered a nail exact where the “fly” had been．Before the old man came back, the smell of the whisky reminded him the accident．Looking at the spot what he thought the “fly” was again, he was so angry that he slapped it with all his strengths．On hearing the loud cry, the landlady rushed in．To her surprise, the poor old man was sitting on the floor with the palm of his hand bleed．