10.下列何者是取代反應? (A)2AgNO3+H2S→Ag2S+2HNO3 (B)CH4(g)+2O2(g)→CO2(g)+2H2O([!--empirenews.page--]g) (C)Na2SO4(aq)+BaCl2(aq)→2NaCl(aq)+BaSO4(s) (D)2KBr+Cl2→2KCl+Br2