A.經(jīng)驗統(tǒng)計分析 B.理論估算 C.理論推導 D.實際操作
A.1%~2% B.4%~6% C.8%~10% D.10%~12%
A.GD—Gi(1+Kh) B.GD—Kh(1+Gf) C.GD—Gf·Kh D.GD—Gf/(1+Kh)