A:次氯酸钙溶液中通入过量二氧化碳:ClO﹣+H2O+CO2═HCO3﹣+HClO
B:过量的NaHSO4与Ba(OH)2溶液反应:Ba2++2OH﹣+2H++SO42﹣═BaSO4↓+2H2O
C:硫酸亚铁溶液中加入过氧化氢溶液:Fe2++2H2O2+4H+═Fe3++4H2O
D:硝酸铁溶液中加过量氨水:Fe3++3NH3•H2O═Fe(OH)3↓+3NH4+
填上>或<。
59 ____ 815
下列关于刑法、宪法、民法之间关系的图示中,正确的是( )
根据首字母提示完成下列短文。
A good class monitor gets on well w____ classmates and likes to h____ others. He often cleans the classroom and makes the classroom c____ just like h____. C____ him to be your monitor.