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【多选题】
天然水的缓冲性决定于水中A.
碳酸一级和二级电离平衡
B.
碳酸钙溶解和沉淀平衡
C.
离子交换缓冲系统
D.
其它弱酸盐平衡
拍照语音搜题，微信中搜索"皮皮学"使用
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负债的特征之一是企业承担的潜在债务
B.
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C.
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