A. [NH4+]+[NH3]= [CO32-]+[HCO3-]+[H2CO3] B. [NH4+]=Cmol/L, [HCO3-]= Cmol/L C. [NH4+]+[H+]=[OH-]+2[CO32-]+[HCO3-] D. [NH4+]= [CO32-]+[HCO3-]= 2Cmol/L