题目

下列离子方程式正确的是(     )     A.NH4HCO3溶液中加入过量稀NaOH溶液:NH4++ OH-=NH3·H2O        B.FeBr2溶液中通入足量的氯气:2Fe2++2Br-+2Cl2=2Fe3++Br2+4Cl-        C.硫酸亚铁溶液中加入用硫酸酸化的双氧水 Fe2++2H++H2O2=Fe3++2H2O     D.在通入过量SO2后的NaOH溶液中加足量的溴水(不考虑SO2的溶解):     HSO3-+Br2+H2O=3H++2Br-+SO42-3. —The meeting was put off because of the smog in (north) China last week.—Oh,it ,s too bad!We should take action to improve the air quality
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