题目

某溶液中可能含有H+、Na+、NH4+、Mg2+、Fe3+、Al3+、SO42-、CO32-等离子。当向该溶液中加入一定物质的量浓度的NaOH溶液时，发现生成沉淀的物质的量随NaOH溶    液的体积变化的图像如下所示，下列说法正确的是A．原溶液中含有的阳离子是H+、NH4+、Mg2+、Al3+[ B．原溶液中一定含有SO42-和Na+ C．原溶液中含有的Fe3+和Al3+的物质的量之比为1:1 D．反应最后形成的溶液中含有的溶质为Na2SO4His mother had thought it would be good for his character to __________ from home to earn some money on his own. [　　] A. run awayB. take away C. keep awayD. get away