一个指法练习程序.程序界面中画出了各个键(限字母)在键盘上的位置,以方便初学者熟悉键盘.可以在程序中设置练习的字母范围,如A~G,H~L...还可以对练习的时间进行设置,时间到后反馈练习成绩.-practice a fingering process. Process interface which depicts the various keys (the letter) in the position of the keyboard, to facilitate beginners fami