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.
The hollow spiral, as he knew from old experience, would bring down to his ears the slightest sound from above; and it now revealed to him the words of a duologue in progress at the summit of the tower.
学习、课
生交流、用户注册等玻璃
钮。
）
里，斯维辛暂停了他
。
最轻微
