以下是预览

http://teacher.am89.com/users/teacher/song88/userupload/l1.swf

http://teacher.am89.com/users/teacher/song88/userupload/l9.swf

http://teacher.am89.com/users/teacher/song88/userupload/l12.swf

http://teacher.am89.com/users/teacher/song88/userupload/l4.swf

http://teacher.am89.com/users/teacher/song88/userupload/l11.swf

http://teacher.am89.com/users/teacher/song88/userupload/l15.swf

http://teacher.am89.com/users/teacher/song88/userupload/l29.swf

http://teacher.am89.com/users/teacher/song88/userupload/l27.swf

http://teacher.am89.com/users/teacher/song88/userupload/l6.swf

http://teacher.am89.com/users/teacher/song88/userupload/l7.swf