This is the lyric of Lime by Yu Qian, a patriotic general in Ming Dynasty ... This poem contains the source, production, nature,

This poem by Yu Qian not only expresses the poet's lofty sentiment of being brave in hardship and sacrifice, but also contains very colorful materials. It embodies the humanistic spirit that people act on the natural environment and the natural environment cultivates people's beautiful sentiments. In order to guide students to think, this poem summarizes the mutual transformation relationship between calcium carbonate and related substances, and describes the workers who burn lime. First, the limestone (containing calcium carbonate) in the deep mountain is broken, and then it is burned into white quicklime (calcium oxide) in the lime kiln. Calcium oxide reacts with water to produce white hydrated lime (calcium hydroxide), and calcium hydroxide reacts with carbon dioxide in the air to produce white calcium carbonate. Such a series of physical and chemical changes, namely CaCO3 → CaO → Ca(OH)2 → CaCO3, have a unique way of thinking and innovative thinking. Answer: d