题目

.高铁酸钾是一种新型高效、绿色环保的净水剂，湿法合成的方程式为2Fe(OH)3＋3KClO＋4KOH＝2X（高铁酸钾）＋3KCl＋5H2O。则X的化学式为 A．K4FeO4B．K2FeO6 C．K2FeO4D．K2Fe2O4 答案：COf all __________ reasons for my decision to become a university professor, my father’s advice was __________ most important one. A. the; a     B. 不填; a     C.  不填; the     D. the; the