题目

— Nancy, can you bring me _______ on the teacher's desk?— Yes, of course. A . all books B . the all books C . all the books D . all the book 答案：C镁条在空气中燃烧后，其生成物中可能含有的物质是（ ）A．MgCO3、MgO、Mg3N2B．Mg（OH）2、MgO、MgCO3C．MgO、Mg3N2、CD．Mg2N3、C、MgO