http://www.tan8.com/thread-705-1-1.html
http://www.tan8.com/thread-7604-1-1.html
五线谱基础知识
转载于:https://www.cnblogs.com/Ph-one/p/5257742.html
http://www.tan8.com/thread-705-1-1.html
http://www.tan8.com/thread-7604-1-1.html
转载于:https://www.cnblogs.com/Ph-one/p/5257742.html