Which of the following solutions are alkaline(碱性)?（ ）
A、Na3PO4•12H2O
B、Na2HPO4•12H2O
C、NaH2PO4•2H2O
D、H3PO4
发布时间：2025-09-23 12:11:42
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答案：Na3PO4•12H2O ■Na2HPO4•12H2O
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