A F MS E FR E R ME R FE E MR E+R=F F+S=R+E=M F FD F AE Smax=F GF DS RI GS 2021/2/24 上页下及2021/2/24 F ● ● R E M F MS MF S =  MR ME E R = F + S = R+ E = M E’ R’ ' ' ' ' FE FR R E = E'+R' = F D DS FD S min = F  G GS GF S max = F 