题目

 —Your school things are here and there. Will you please          ?  —OK, I’ll do it right away.      A. give them away  B. fix them up     C. hand them out       D. put them away 答案：D 化学用语是学习化学的重要工具，下列化学用语书写错误的是 [　　] A．＋2价的镁元素Mg+2 B．亚铁离子Fe2+ C．2个氮原子2N D．3个铵根离子3NH4+