关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入! 2022-10-28 quartz quartz 答案: 查看 举一反三 Is quartz a mineral? Smoky quartz is the quartz contains trace amounts of: A: Al B: Fe C: Ca D: Mg Quartz is natural abrasive. What are the the form of silica? A: alpha quartz B: beta quartz C: tridymite D: Normal atmospheric dusts Quartz exhibits conchoidal fracture.