A.75
B.80
C.85
D.90
A.75
B.80
C.85
D.90
A.90%
B.91%
C.93%
D.95%
A.90%
B.93%
C.95%
D.97%
A.85%
B.90%
C.93%
D.95%
A.90%
B.92%
C.93%
D.98%
A.90%
B.93%
C.95%
D.97%
A.0.2%
B.0.3%
C.0.4%
D.0.5%
A.一般土质地段
B.粘性土质地段
C.砂质地段
D.岩质地段
A.70
B.75
C.80
D.85