可利用冬期水位低,开挖基坑修建防护工程的地段是( )。
A. 半填半挖地段
B. 泥沼地段
C. 岩石地段
D. 河滩地段
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急流槽的纵坡不宜超过( ),同时应与天然地面坡度相配合。
A. 1:1.5
B. 1:2.0
C. 1:2.5
D. 1:3.0
对于滑坡顶面的地表水,应采取( )等措施处理,以防地表水流入滑动面内。
A. 渗沟
B. 暗管
C. 截水沟
D. 检查井
洞式渗沟的洞壁宜采用( )砌筑。
A. 浆砌片石
B. 干砌片石
C. 土工织物
D. 粗粒透水材料
Those who consider the poverty line high point out that ______.
A. the poor people enjoy other benefits
B. the society as a whole is not well-off
C. the poor people may conceal their real income
D. the poor people need less money to support themselves