牛顿曾经说过:“在数学中,最微小的误差也不能忽略.”这里给大家介绍两则真实的故事.从前,医生常推荐儿童和康复中的病人多吃菠菜,根据是菠菜里面含有大量的铁质,有养血、补血之功能.可是,前联邦德国化学家劳尔赫在研究化肥对蔬菜的有害作用时,却无意中发现,菠菜的实际含铁量并不像有 Newton once said: “In mathematics, the slightest error can not be ignored. ” Here we introduce two real stories. Once in the past, doctors often recommend children and rehabilitation patients eat more spinach, according to the spinach inside It contains a large amount of iron, which has the function of nourishing blood and supplementing blood. However, when the former federal German chemist Raul studied the harmful effects of chemical fertilizers on vegetables, he accidentally discovered that the actual iron content of spinach is not like