十 九世纪末 ,一位德国学者做了这样一个试验。他烧开了一锅水 ,把一只青蛙放进去。这只青蛙刚触到滚水就猛地跳出来 ,反应十分敏捷。他又把冷水放进锅里 ,仍然把这只青蛙放进去 ,青蛙轻快地游起来。学者在锅底慢慢加温 ,青蛙开始似乎感到挺舒服 ,继续游。但当温度升高 ,青蛙感 At the end of the nineteenth century, a German scholar made such a test. He boiled a pot of water and put a frog in it. The frog jumped out just after it touched the water and the reaction was very agile. He put the cold water into the pan, still putting the frog in, and the frog briskly. Scholars slowly warming up in the bottom of the pot, the frog seems to feel very comfortable, continue to swim. But when the temperature rises, frogs feel