美国加利福尼亚大学的一位心理学教授曾做过一个关于青蛙的实验。把一只欢蹦乱跳的青蛙，突然扔进沸腾的油锅，在这生死存亡的关键时刻，这只青蛙居然奋力一跃，竟出人意料地跳出油锅，安然逃生。过了一会儿，教授又把这只青蛙放到了一个盛满凉水的锅中，青蛙游得逍遥自在，怡 A professor of psychology at the University of California, USA, has done an experiment on frogs. Tossing a happy frog into a boiling oil pan, at the critical moment of life and death, the frog jumped out of action and unexpectedly jumped out of the pan and escaped. After a while, the professor put the frog into a pot full of cold water, and the frog was swimming freely.