知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 A Person important REE application is long lasting magnets, without which wind turbines wouldn’t flip and EV motors would stand nonetheless. REEs arise often during the Earth’s crust but only in quite small concentrations in comparison to metals such as iron, copper or gold. 三氧化二铁（别名烧褐铁矿、烧赭上、铁丹等）是... https://www.friend007.com/post/565597_molybdenum-is-a-refractory-metal-with-exceptional-strength-and-heat-resistance-p.html