Cu+2AgNO3===2Ag+Cu(NO3)2
CuO+2HCl===CuCl2+H2O
NaOH+HCl===NaCl+H2O
AgNO3+HCl===AgCl沉淀+HNO3
AgNO3+NaOH===AgOH沉淀+NaNO3