题目

I truly believe ______beauty comes from within. A . that B . where C . what D . why 答案：A加热63.2克KMnO4，当得到6克氧气时，剩余固体的成分是A.K2MnO4和MnO2B.KMnO4和K2MnO4C.KMnO4、K2MnO4和MnO2D.KMnO4和MnO2