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卡片总数: 1 张•内容版本: v4•公开卡包•更新时间: 8/1/2026
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正面 (问题)
Gold and other minerals are found as ore on Earth. How does mineral ore form?
背面 (解答)
Ore deposits such as gold form when ocean water is heated by the mantle. This causes pieces of the minerals to clump together. They are then buried.