煤中硫含量低于1%时，往往以（）为主。 

A. 0.05%
B. 0.10%
C. 0.15%
D. 0.20%

A. 0.05%
B. 0.10%
C. 0.15%
D. 0.20%

A.NaSO₄+2BaCl→Ba₂SO₄↓+2NaCl
B.Na₂SO₄+BaCl₂→BaSO₄↓+2NaCl
C.MgSO₄+Na₂SO₄+2BaCl₂→2BaSO₄↓+2NaCl+MgCl₂
D.MgSO₄+NaSO₄+2BaCl→BaSO₄↓+NaCl+MgCl