A.總時(shí)差最小 B.關(guān)鍵線(xiàn)路上 C.自由時(shí)差為零 D.持續(xù)時(shí)間最長(zhǎng) E.兩端節(jié)點(diǎn)為關(guān)鍵節(jié)點(diǎn)
A.14 B.16 C.20 D.28