A.需求分析
B.詳細(xì)調(diào)查
C.總體設(shè)計(jì)
D.邏輯設(shè)計(jì)

A.基本數(shù)據(jù)項(xiàng)描述，數(shù)據(jù)結(jié)構(gòu)定義，數(shù)據(jù)流的說(shuō)明，數(shù)據(jù)處理描述，外部實(shí)體描述
B.基本數(shù)據(jù)項(xiàng)描述，數(shù)據(jù)結(jié)構(gòu)定義，數(shù)據(jù)流的說(shuō)明，數(shù)據(jù)處理描述，數(shù)據(jù)存儲(chǔ)模式，外部實(shí)體描述
C.數(shù)據(jù)結(jié)構(gòu)定義，數(shù)據(jù)流的說(shuō)明，數(shù)據(jù)處理描述，數(shù)據(jù)存儲(chǔ)模式，外部實(shí)體描述
D.基本數(shù)據(jù)項(xiàng)描述，數(shù)據(jù)流的說(shuō)明，數(shù)據(jù)處理描述，數(shù)據(jù)存儲(chǔ)模式，外部實(shí)體描述