glassiness

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.

其首页界面包括：课程学习、课程大纲、网上测评、师生交流、用户注册等玻按钮。

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.

配比为25%和50%的两种烧结矿中铁化物均以赤铁矿、磁铁矿为，粘结以铁酸钙、硅酸二钙和玻为，但铁酸钙数量不多。