A.①②③ | B.②④ | C.②③ | D.②③⑤ |
A. | B. |
C. | D. |
A.Fe2O3→ Fe | B.H2 → H2O |
C.HCl→FeCl2 | D.Na →NaOH |
A.铝的表面生成致密的薄膜 | B.大理石雕像被酸雨腐蚀毁坏 |
C.食物腐败 | D.钠在空气中燃烧 |
A.2F2 + 2H2O =" 4HF" + O2 | B.Cl2 + H2O =" HCl" + HClO |
C.NaCl +AgNO3 =" AgCl↓+" NaNO3 | D.2FeCl3+Fe = 3FeCl2 |
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