A.1.0m; B.0.6m; C.0.25m~0.5m; D.視土體的強(qiáng)度大小而變化;
A.路線穿越法; B.追索法; C.布點(diǎn)法; D.A+B+C
A.鉆孔巖心; B.探井; C.平洞; D.A+B+C