俗话说万事开头难。世界上无论什么事都有个“头”。追根查源,可以找到由谁发现和谁第一次使用的。例如矿工们使用的安全灯,在坑道里使用不会引起爆炸,是谁发明和由谁试用的?英国化学家戴维接触矿工时,知道矿工们都懂得,在充满瓦斯的坑道里,只要一出现了火光,就会引起瓦斯爆炸,造或坑道崩塌,工人丧生。为了避免瓦斯爆炸,长期以来矿工们只能在黑暗中摸索着干活.戴维后来满足 As the saying goes, everything is hard at first. No matter what the world has a “head”. Chasing roots to find out who discovered and who used it for the first time. For example, miners who use safety lights in the tunnel will not cause an explosion, who invented and by whom the pilot? British chemist David in contact with the miners, knowing miners who know, in the gas filled tunnel, as long as one The flames, which can cause gas explosions, collapses or tunnels, and workers are killed. In order to avoid gas explosion, miners have long been able to groping for work in the dark David later met