(不可用方程)
更新1:
WaiAsd : (15-15*0.75)/(0.75-0.6) 點解要15*0.75???
更新2:
WaiAsd : (15-15*0.75)/(0.75-0.6) 點解要(15-15*0.75)/(0.75-0.6)
更新3:
WaiAsd : 點解要(15-15*0.75)/(0.75-0.6)?