单项选择题
A.0.5%,1/4~1/2 B.1%,1/2~1 C.1.5%,1~20 D.1.2%,2~3
A.预制桩锤击沉桩 B.预制桩静压沉桩 C.振动沉管灌注桩
A.1/3 B.2/3 C.1/4 D.1/2