有这么一个大家都非常熟悉的故事:有一天农夫上山砍柴,路上看到一条已冻僵的蛇,农夫觉得非常可怜,就把它放在自己的怀里让它暖和暖和。过了一会儿,蛇苏醒过来了,就咬了农夫一口。你一定认为蛇很坏,是吗?对!我们都会认为蛇太坏,农夫的好心没好报!可是,我们学过自然科学后就会知 There is such a story that everyone is very familiar with: One day, the farmer goes up the hill and cuts firewood. When he sees a frozen snake on the road, the farmer feels very miserable. He put it in his arms to warm it. After a while, the snake revived and bit the farmer. You must think that the snake is bad, right? Yes! We all think that the snake is too bad, the farmers’ good intentions are not reported! However, we will know after learning the natural sciences.