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铁合金在线
6 小时
科学家提出重金属元素新的成因
科学家们推测,在138亿年前宇宙大爆炸早期,氢和氦等较轻的元素,甚至少量的锂都可能存在。后来,一些重元素,包括铁都在星体中形成,但一些比铁重的元素例如金的成因仍是一个谜。
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