最佳答案:1. the computer technology is widely applied, has had the huge influence to our
最佳答案:解题思路:(1)根据含SiO296%的石英石的质量,计算出含二氧化硅的质量即可.(2)根据25t含SiO296%的石英石中SiO2的质量,由反应的化学方程式计算