A:NaCl+KNO3═KCl+NaNO3
B:Fe2O3+3CO═2Fe+3CO2
C:Fe+2HCl═FeCl2+H2↑
D:2Fe+3O2 点燃__ 2Fe2O3
What was Jim's first teacher like?
Tom and Jenny are in the same school. And _________ like sports very much.