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【单选题】
梳理化学知识有利于理解和记忆，使你的学习更轻松。以下内容完全正确的一组是 [     ]
A.
物质的性质与用途 N 2 性质稳定--可作灯泡填充气 NaHCO 3 能与酸反应--可治疗胃酸过多症
B.
安全常识 煤气中毒--主要由CO 2 引起 工业用盐中毒--由NaNO 2 引起
C.
元素与人体健康 缺锌--影响人体发育 缺铁--易发生骨质疏松或患佝偻病
D.
日常生活经验 食品干燥剂--常用CaO 将硬水软化--可用过滤法
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