题目

向含2mol KAl(SO4)2的溶液中加入2L 3.5mol/LNaOH溶液，则铝元素的存在形式有A.全部为AlO2—   B.全部为Al(OH)3      C. Al(OH)3  和AlO2—     D. Al(OH)3  和Al3+  答案：C解析: I ______ you at 9 o’clock tomorrow morning in front of the school gate.A．will be expecting B．will expect C．am expecting D．expect