题目内容：

下列离子方程式对应的化学方程式正确的是

A．H++OH-=H2O                     CH3COOH+NaOH=CH3COONa+H2O

B．Ba2++SO42-=BaSO4↓               Ba(OH)2+H2SO4=BaSO4↓+2H2O

C．CO32-+2H+=CO2↑+H2O              CaCO3+2HCl=CaCl2+CO2↑+H2O

D．3Cu+8H++2NO3-=3Cu2++2NO↑+4H2O  3Cu+8HNO3(稀)=3Cu（NO3）2+2NO↑+4H2O