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、用等玻璃质感按钮。

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%的两种烧结矿化物均以赤矿、磁矿为主，粘结相主要以酸钙、硅酸二钙和玻璃质为主，但酸钙数量不多。