A.CO₂?               B.NH₃?                 C.Cl₂?               D.H₂S

A.CO₂                  B.NH₃                      C.Cl₂                 D.H₂S

A.CO₂              B.NH₃                C.Cl₂                D.H₂S

A.CO₂                 B.NH₃                 C.Cl₂                D.H₂S

将SO₂通入BaCl₂溶液至饱和未见沉淀生成，继续通入某种气体仍无沉淀生成，则该气体可能是(    )

A.CO₂               B.NH₃            C.Cl₂                D.H₂S