Geopolymers of metakaolin and sodium silicate were synthesized respectively with the ratios of the amount of SiO2 in the......

报告1例幼年性透明纤维瘤病。患者女，17岁。头部多发性结节、包块4年，无自觉症状。皮肤科检查：枕部可见5个半球形包块，质软，表面光滑。......