A.前40° B.后40° C.30° D.前10°
A.實(shí)際點(diǎn)火提前角=初始點(diǎn)火提前角+基本點(diǎn)火提前角+修正點(diǎn)火提前角 B.實(shí)際點(diǎn)火提前角=基本點(diǎn)火提前角×點(diǎn)火提前角修正系數(shù) C.實(shí)際點(diǎn)火提前角=基本點(diǎn)火提前角×點(diǎn)火提前角修正系數(shù)+修正點(diǎn)火提前角 D.實(shí)際點(diǎn)火提前角=初始點(diǎn)火提前角+基本點(diǎn)火提前角×點(diǎn)火提前角修正系數(shù)