下列矿物类药材中属于铁化合物类的有（）
A.磁石
B.炉甘石
C.赭石
D.雄黄
E.自然铜
参考答案：A, C, E
After Lincoln was made ___ president of the United States, he insisted on the slaves___. . A /; be set free B /; being set free C the; setting free D the ; being set free
钙矽卡岩
