A.動力性下降,經(jīng)濟(jì)性下降 B.動力性提高,經(jīng)濟(jì)性下降 C.動力性下降,經(jīng)濟(jì)性提高 D.動力性提高,經(jīng)濟(jì)性提高
A.小于7.35kW/t B.10kW/t左右 C.14.7~20.6kW/t D.大于90kW/t