在知道中大家都在讨论氢氧化亚铁的颜色问题，我在教学中发现：纯氢氧化亚铁是白色的。
Everyone in the know in the discussion of the color of ferrous hydroxide, I found in teaching: purity of ferrous oxide is white.
在知道中大家都在讨论氢氧化亚铁的颜色问题，我在教学中发现：纯氢氧化亚铁是白色的。
Everyone in the know in the discussion of the color of ferrous hydroxide, I found in teaching: purity of ferrous oxide is white.
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