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17 小时
NREE: 铁氧化物磷灰石矿床的形成
铁氧化物磷灰石矿床 (iron oxide-apatite deposits),又被称为基鲁纳型铁矿,因1910年被详细描述的瑞典基鲁纳 (Kiruna)矿床而得名(是世界最大的铁矿床和描述最详细的矿床之一),另外它还被称为玢岩铁矿,磁铁磷灰石矿床等 ...
12 天
二、用一分钟阅读下列问题,然后听第二遍音频并回答问题:
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
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