The prontpage interface of Web courseware includes glassiness buttons of course learning, course project, Web test and review, duologue between teacher and student, and user registration etc.

课程学习、课程大纲、网上测评、师生交流、用户注璃质感按钮。

For sinter with 25% and 50% MAC fines the iron oxides mainly consisted of hematite and magnetite, the bonding phase were mainly dicalcium silicate, glassiness, and a few amount of calcium ferrite.

配为25%和50%的两种烧铁氧化物均以赤铁、磁铁为主，粘相主要以铁酸钙、硅酸二钙和璃质为主，但铁酸钙数量不多。