组成为Na2O·Al2O3·SiO2·nH2O的铝硅酸盐中有许多笼状孔穴和通道,很容易吸收水、二氧化碳等小分子,常用于物质的分离和提纯。.?+_3k*Z.h;g8l4U8p
Na2O·Al2O3·SiO2·nH2O中Si元素的化合价是 请选择DCBA'H+B:e5s7_9X/t:x.?+_3k*Z.h;g8l4U8p
A.+2.?+_3k*Z.h;g8l4U8p
B.+4.?+_3k*Z.h;g8l4U8p
C.+6.?+_3k*Z.h;g8l4U8p
D.-2.?+_3k*Z.h;g8l4U8p