一般排水沟的横断面和纵向坡度不宜小于()。
A: 0.4m×0.4m,0.1%
B: 0.5m×0.5m,0.1%
C: 0.4m×0.4m,0.2%
D: 0.5m×0.5m,0.2%
A: 0.4m×0.4m,0.1%
B: 0.5m×0.5m,0.1%
C: 0.4m×0.4m,0.2%
D: 0.5m×0.5m,0.2%
举一反三
- 集水井降水中,排水沟的横断面和纵向坡度不宜小于( )。 A: 0.4m*0.4m,0.1% B: 0.5m*0.5m,0.1% C: 0.4m*0.4m,0.2% D: 0.5m*0.5m,0.2%
- 一般施工现场排水沟的横断面和纵向坡度不宜小于( )。 A: 0.4m×0.4m,0.1% B: 0.5m×0.5m,0.1% C: 0.4m×0.4m,0. 2% D: 0.5m×0.5m,0. 2%
- 普通光学显微镜最高可分辨()。 A: 0.1μm B: 0.2μm C: 0.3μm D: 0.4μm E: 0.5μm
- 光学显微镜的最小分辨距离是()。 A: 0.1μm B: 0.2μm C: 0.3μm D: 0.4μm E: 0.5μm
- 集水井降水中,排水沟的横断面和纵向坡度不宜小于()。 A: 0.4m,0.3% B: 0.5m,0.1% C: 0.4m,0.2% D: 0.3m,0.3%