单项选择题
A.等于挖土体积 B.等于挖土体积减去填土总体积 C.等于基础回填土体积 D.等于室内回填土体积
A.1114.3 B.1072.3 C.1086.3 D.1030.3
A.25% B.20% C.15% D.30%