【实验21】按键的蜂音提示\key
........................\key.hex
........................\key.lnp
........................\key.M51
........................\key.plg
........................\keybeep.c
........................\keybeep.LST
........................\keybeep.OBJ
........................\keybeep.Opt
........................\keybeep.Uv2
........................\keybeep_Opt.Bak
........................\keybeep_Uv2.Bak
【实验21】按键的蜂音提示