在历史的长河中,50年仅仅是弹指一挥间,但是,对于中国人民来说,则是翻天覆地的50年。中国人民从1949年建国的那一天开始,是真正地站立起来了。新生的中国是一穷二白的,1949年全中国铁产量25万t,钢仅16万t,原煤产量只有3200万t,硫酸4万t。这些数据摆在人们的面前,表明当时的中国是贫穷、落后的。当时号称地大物博、资源丰富的中国,有色金属总产量仅仅1.33万t,与 In the history of the river, 50 years is only a flick of a finger, but for the Chinese people, it is earth-shaking 50 years. From the day when the Chinese people founded the nation in 1949, they really stood up. The newborn China is a poor and lonely country. In 1949, the total iron production in China was 250,000 tons and that of steel was only 160,000 tons. The output of raw coal was only 32 million tons and that of sulfuric acid was 40,000 tons. These figures are put in front of people, indicating that China was poor and backward at the time. At that time claimed to be rich and powerful, resource-rich China, the total output of non-ferrous metals only 13300 t, and