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A | B | C | D | |
Ëá | HCl | H2SO4 | NaHSO4 | HNO3 |
¼î | Na2CO3 | NaOH | Fe(OH)3 | KOH |
ÑÎ | CuSO4 | BaSO4 | NaCl | NaHCO3 |
Ñõ»¯Îï | H2O | KClO3 | CuO | Na2O |
A.AB.BC.CD.D