选项 |
A |
B |
C |
D |
甲 |
HCl |
CO2 |
Ca(OH)2 |
Fe |
乙 |
Ca(OH)2 |
NaOH |
Na2CO3 |
HCl |
丙 |
K2CO3 |
CaCl2 |
H2SO4 |
CuSO4 |
丁 |
H2SO4 |
AgNO3 |
BaCl2 |
NaOH |