一、以氧气为信息源,考查科学发展史例1 化学家舍勒和普利斯特里早在18世纪就先后独立地发现了氧气,但由于受“燃素理论”的影响(即认为一切可以燃烧的物质都是由灰和“燃素”组成的,物质燃烧后剩下的是灰,而燃素本身变成了光和热,散逸到空气中去了),使他们放弃了自己的研究成果. I. Using oxygen as a source of information to examine the history of scientific development. 1 The chemists Scheler and Pricelid independently discovered oxygen in the 18th century, but they were affected by the “phlogiston theory” (that is, everything The burning material is composed of ash and “phlogiston.” After the material is burned, it is ash. The phlogiston itself becomes light and heat and escapes into the air, so that they give up their own research results.