炼金术士之梦─—铜币变“金币”的实验吴祺这是一个很有趣的实验，可以简单地把一枚铜币先变成“银币”然后又变成“金币”，这种变化不正是古代炼金术士们梦寐以求的吗？目的：１．观察实验过程中铜币是怎样变成“银币’”以及它又怎样变成“金巾’”的。２．了解变化的... The dream of the alchemist ─ ─ the experiment of copper coins becoming “gold coins” Wu Tao This is a very interesting experiment. It can simply turn a copper coin into a “silver coin” and then a “gold coin”. This change is not exactly an ancient one. Are the alchemists dreaming? Purpose: 1. Observe how copper coins became “silver coins” and how they became “golden towels” during the experiment. 2. Learn about the changes...