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Ñ¡Ïî | X | Y | Z |
A | Cu | HNO3 | Fe(NO3)3 |
B | FeCl3 | Zn | NaHCO3 |
C | O2 | NH3 | SO2 |
D | NH4Al(SO4)2 | Ba(NO3)2 | NaOH |
A. A B. B C. C D. D