检索课程布局修改
全屏按钮隐藏
Merge branch 'master' of https://github.com/HowToLove/Cloud-Lab

Conflicts:
	cloud_lab/TeacherOnClass.html
Merge branch 'master' of https://github.com/HowToLove/Cloud-Lab

Conflicts:
	cloud_lab/TeacherOnClass.html