反滤沟导渗可排出渗水,降低()。
A.临河水位
B.浸润线
C.渗水比降
D.渗水量
参考答案:B
I can't go out now because I have _____________ homework to do. [ ]
A. many
B. much
C. a
钻孔灌注桩选择反循环回转机械成孔,其适宜细粒土、砂类土,卵石粒小于钻杆内径 ( ),含量少于20%的卵石土、软岩。
A.1/2
B.1/3
C.2/3
D.3/4