metal: malleable, high melting point, high boiling point, high density, ductile, usually solid at room temperature, conductor of heat, conductor of electricity, non metal: low melting point, low boiling point, oxygen, sulfur, lower density, brittle, poor conductors, often gas at room temperature,

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?