十五、未来的金属随着科学技术的发展,将来,金属会部分或大部分被其它材料所代替。现在就可以预见到,非金属材料中的塑料代替金属材料的可能性最大。目前,塑料生产增长速度很快,在产量上已远远超过所有金属的年总产量,相信在不久的将来,如以体积计算,也一定会把钢的生产抛在后边。尽管如此,钢铁等材料还会长期占 Fifth, the future of metal With the development of science and technology, in the future, the metal will be part or most of the other materials to be replaced. It is now foreseeable that plastics in non-metallic materials are most likely to replace metallic materials. At present, plastic production has grown rapidly and has far exceeded the total annual output of all metals in production. I believe that in the near future, if the volume is calculated, the production of steel will certainly be left behind. In spite of this, materials such as steel will also take a long time