首页 / 百科 / 内容详情 White cement is achieved by decreasing the ratio of Al2O3 to Fe2O3 in the raw materials. 2022-04-30 5次阅读 decreasing The materials White cement is achieved by decreasing the ratio of Al2O3 to Fe2O3 in the raw materials. A.正确B.错误正确答案：错误 Ceramics are, by nature, generally porous materials with varying degrees of（）. Many glasses are electrolytic conductors at elevated temperatures. 猜你喜欢