A.THCl/CaCO3=0.005000g/mL B.THCl/CaCO3=0.005g/mL C.TCaCO3/HCl=0.005000g/mL D.TCaCO3/HCl=0.005g/mL
A.12mol,12g B.12mol,440g C.32mol,12g D.32mol,440g
A.1 B.2 C.3 D.4