A.必要性和可行性 B.必要性和經(jīng)濟(jì)性 C.技術(shù)性和迫切性 D.經(jīng)濟(jì)性和迫切性
A.樹形結(jié)構(gòu)B.網(wǎng)絡(luò)結(jié)構(gòu)C.二維表D.星形結(jié)構(gòu)
A.規(guī)劃設(shè)計(jì)和實(shí)施過程都是采用自頂向下 B.規(guī)劃設(shè)計(jì)和實(shí)施過程都是采用自下向頂 C.規(guī)劃設(shè)計(jì)是自頂向下,實(shí)施過程是自下向頂 D.規(guī)劃設(shè)計(jì)是自下向頂,實(shí)施過程是自頂向下