同学们,当你乘火车或地铁的时候,不知你注意到没有,靠近站台的边缘都画有一条醒目的白线——安全线。在火车进出站时,车站服务人员总是呼唤、提醒旅客站在安全线外,这是为什么呢? 先请同学们看一桩历史上的惨案。 1905年冬季的一天,在莫斯科至西伯利亚铁路线上的鄂洛多克小站上,站长沃尔伦斯基穿着一身崭新的 My classmates, when you take the train or the subway, I do not know if you noticed that there is an eye-catching white line near the edge of the platform - the safety line. When the train in and out of the station, the station service staff always call to remind passengers to stand outside the safety line, which is why? Students first look at a tragedy in history. One day in the winter of 1905, on the small railway station in Erdok, Moscow to Siberia, the stationmaster Vollenski wore a brand new