要求快硬、高强的混凝土应优先选用()。
A.普通水泥
B.矿渣水泥、火山灰水泥
C.硅酸盐水泥
D.复合水泥
参考答案:C
He is a foreigner. But now he on the right of the road in China.
A.used to drive
B.is used to drive
C.used to driving
D.is used to driving
下列选项除哪一项外,均为融合肾()。
A.马蹄肾
B.S型肾
C.同侧融合肾
D.重复肾
E.对侧融合肾