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  3. Although all sedimentary rocks contain iron, (but the deposits) that (are riches

Although all sedimentary rocks contain iron, (but the deposits) that (are riches

游客2025-02-09  16
问题 Although all sedimentary rocks contain iron, (but the deposits) that (are richest) in iron (consist) predominantly of minerals (such as) iron oxides, carbonates, silicates, and sulfides.
选项 A、but the deposits
B、are richest
C、consist
D、such as
答案 A
解析
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