問題詳情
五、飲闬水常因硬度過高而需加以軟化。請問何謂硬度？常用的化學軟化方 式為何？請以化學計量式討論之。（20分）
參考答案
答案：C
難度：非常簡單0.950503
統計：A(19),B(33),C(1229),D(12),E(0)
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