A:用大理石跟稀盐酸制二氧化碳:CO 32− +2H+═H2O+CO2↑
B:向氢氧化钡溶液中加硫酸溶液:SO 42− +Ba2+=BaSO4↓
C:硫酸溶液中加入Mg(OH)2:2H++2OH﹣=2H2O
D:澄清石灰水与盐酸的反应:H++OH﹣=H2O
How many girls?
- _________are his football clothes?
- Under the bed.