Eight percent of
2017-03-06 16:24:43 3 举报AI智能生成
Gre reading p4
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bauxite
best ore
richest in large quantities
yield alumina
alumina
intermediate production of producing aluminum
not found in large deposits of high purity
impractical source
silicates
resistant to analysis
unsuitable alternatives to bauxite
more energy is required to get alumina
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