魔术再现魔术表演开始,一位身着黑衣的魔术师走上舞台,将手中的10枚硬币零乱地撒在了桌面上(如图1),通过投影仪反射的图像,台下的观众可以清楚地从大屏幕上看到硬币中有的正面数字朝上,有的背面国徽图案朝上,从中看不出有什么规律。 Magic reproduction magic show began, a black magician took to the stage, the hands of 10 coins scattered on the desktop (Figure 1), through the projector reflected images, the audience can be audience Clearly from the big screen to see some of the positive figures in the coin up, and some on the back emblem pattern up, from which we can not see any law.