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课程 3
Mixtures and alloys
📖 课程
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🎯 测验——选择翻译
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✅ 本课已完成
A mixture is when substances are together but not chemically bonded. Salt in water is a mixture — you can separate it again. An alloy is a metal mixture: bronze = copper + tin.
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盐水
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空气是混合气体
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合金
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乳状液
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岩石
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泡沫