A.3 B.2 C.3 D.4
A.30%~40% B.20%~30% C.10%~20% D.5%~10%
A.滿足鍋爐給水水質(zhì)標(biāo)準(zhǔn) B.技術(shù)可靠、經(jīng)濟(jì)合理 C.鍋爐的蒸汽品質(zhì)能滿足用戶的要求 D.鍋爐的排污系統(tǒng)完備