题目

下列反应属于氧化还原反应的是（      ）A．H2SO4＋2NaOH  Na2SO4＋2H2OB．2NaHCO3 Na2CO3 + CO2↑ + H2OC．NH3+ HCl  NH4Cl  D．CuO ＋ H2 Cu ＋ H2O  答案：D解析:略 ___________ David showed the report to the public surprised me. A What   B. That   C. Which   D. Who