混凝土常用的水泥有硅酸盐水泥、矿渣水泥、普通水泥、火山灰水泥、粉煤灰水泥五大类水泥。
参考答案：对
春秋五霸中最先取得霸主地位的是( )
A．楚庄王
B．宋襄公
C．齐桓公
D．晋文公
Several Chinese films are rising to international fame, _____ broke back mountain directed Ang Lee
has won the Oscar Awards.[ ]
A. such as
B. for example
C. namely
D. that is
