A -TiO 2 (锐铁矿)与R—TiO 2 (金红石:)混合物衍射花样中两线强度比I A -TiO2 /I R-TO2 =1.5。试用参比强度法计算两相各自的质量分数。 (通过查阅pdf卡片得知A-TiO 2 用的是d=0.351nm的线条, K A =4.3 ,R-TiO 2 用的是d=0.325nm的线条, K R =3.4 )
【单选题】完成下列各题 Young Marconi had the teachers to give him lessons at home in Italy.He loved books,especially 21 on science.He had curious mind and always wanted to prove for himself 22 he read. 23 day,when he...