A.2 B.4 C.10 D.15
A.0.8 B.0.9 C.1.1 D.1.15
A.目標(biāo)節(jié)點(diǎn) B.終端節(jié)點(diǎn) C.執(zhí)行節(jié)點(diǎn) D.中間節(jié)點(diǎn)