Everything from homogeneous pure chemicals to the most heterogeneous of minerals, overing the whole spectrum of the Mol hardness scale, except maybe diamond.

 
  • 什么都可以,從純的均勻化學(xué)物質(zhì)到大多數非均勻的礦物,范圍覆蓋整個(gè)莫氏硬度,也許只有鉆石除外。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan