有一道儿童智力题是这样的：一根木头上有 5只青蛙，其中 3只准备跳下去，问木头上还有几只青蛙 ?正确的答案为木头上仍有 5只青蛙。这道题的有趣之处在于告诉孩子们一个事实：准备跳和跳下去是两回事。 　　由于人的天性，大部分人可能都是想的比说的多，说的比做的多。人的根 There is a children’s puzzle like this: There are five frogs on a piece of wood, three of which are ready to jump off and ask how many frogs are there on the wood. The correct answer is that there are still five frogs on the wood. The interesting thing about this question is to tell the children one thing: preparing for the jump and jumping are two different things. Because of human nature, most people may think more than say, say more than do. Human roots