铁率
参考答案:
表示熟料中氧化铝和氧化铁含量的质量比,也表示熟料中熔剂矿物铝酸三钙与铁铝酸四钙的比例。
Many large cities,such as Liverpool and New York,have had experiments of this kind,________old factories turned into successful art centers.
A.with
B.for
C.as
D.like
关于加、减档的时机选择,下列说法正确的右:()
A.当加速不明显时,及时升档
B.当发动机有反拖感时,及时减档
C.当发动机高于经济转速时,及时加档
D.当发动机低于经济转速时,及时减档