取水构筑物淹没进水孔上像在设计最低水位下的深度,当采用顶面进水时,不得小于______m。
A.0.5 B.0.3 C.1.0 D.1.5
参考答案:A
- How do you know so many English words?
- _____ reading all kinds of English books , like magazines and newspapers. [ ]
A. For
B. In
C. By
D. With
新月体内的成分有:()
A.壁层上皮细胞
B.纤维素
C.单核细胞
D.嗜中性粒细胞