A.先選用后準(zhǔn)入 B.先準(zhǔn)入后選用 C.邊選用邊準(zhǔn)入 D.按現(xiàn)場(chǎng)實(shí)際需求
A.50%-70% B.55%-75% C.60%-80% D.65%-85%
A.5% B.8% C.10% D.15%