第54页

信息发布者:
A
B
$\ \text {NaOH+HCl}\xlongequal[\ \ \ \ \ \ ]{}\ \text {NaCl+H}_2\ \text {O}$
$\ \text {C+CO}_2\xlongequal[\ \ \ \ \ \ ]{高温}2\ \text {CO}$
$\ \text {Fe+CuSO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {FeSO}_4+\ \text {Cu}$
$\mathrm{KCl}+\mathrm{AgNO}_{3}=\mathrm{KNO}_{3}+\mathrm{AgCl} \downarrow$
$2\ \text {KOH+H}_2\ \text {SO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {K}_2\ \text {SO}_4+2\ \text {H}_2\ \text {O}$
④⑥
${\rm \mathrm{CuSO}_{4}+ \mathrm{Ba}(\mathrm{NO}_{3})_{2}= \mathrm{Ba}SO_{4}\downarrow + \mathrm{Cu}(\mathrm{NO}_{3})_{2}}$
金属氧化物+酸
B