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日常生活中,我们使用的大量东西都是由金属制成的,铁是其中最重要的一种。从两三千年前揭开序幕的铁器时代延续至今,随着冶金工业的发展和制取硬合金方法的发明,铁对人类生活的意义大大提高了。你是否跟上了时代,将你的回答与题后的正确答案核对一下就清楚了。1.19世纪中叶创立
A lot of things we use in everyday life are made of metal, and iron is the most important of them. From the time of the Iron Age, which started two or three thousand years ago, up to now, with the development of the metallurgical industry and the invention of the hard alloy method, the significance of iron in human life has greatly increased. It is clear that you have followed the times and checked your answers with the correct answer after the question. 1.19 century founded