Reversible Changes: Melting Butter, Melting Chocolate, Water Condensing, Puddle Evaporating, Oil and Water Mixing, Blowing up a balloon, ice melting, Irreversible Changes: Baking Biscuits, Frying Eggs, Toasting Bread, Boiling Potatoes, Mixing Dough, Burning Wood, Cutting paper,

Sorting Reversible and Irreversible Changes

排行榜

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切換範本

恢復自動保存: ?