A. 地下水的酸碱度是由水中的HCO3－离子的浓度决定的
B. 地下水中各种离子、分子、化合物（不含气体）的总和称为矿化度
C. 水的硬度由水中Na＋、K＋离子的含量决定
D. 根据各种化学腐蚀所起的破坏作用，将侵蚀CO2，HCO3－离子和pH值归纳为结晶类腐蚀性的评价指标
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