题目

下列反应的离子方程式正确的是 A.碳酸钠溶液中滴入少量盐酸:2H++CO32-=H2O + CO2 ↑ B.硫酸铝溶液中加入过量氨水: Al3+ + 4OH-=AlO2- + H2O C 碳酸氢钠溶液中滴入少量氢氧化钡溶液:2HCO3- + Ba2+ + 2OH-==BaCO3↓+CO32- +2H2O D.FeS溶于稀硝酸:FeS +2H+=H2S↑+Fe3+ 答案：C3. 跟读课文，回答下列问题并在小组内交流。(1 ) Is there a party at the prince's house?   .(2) Why is Cinderella so sad?   . (3) Does Cinderella have any nice clothes or shoes?  .(4) Do many girls try on the shoe?   .