A.1:0.5
B.1:1
C.1:1.5
D.1:2
A.1:0.5
B.1:1
C.1:1.5
D.1:2
A.18.08
B.19.71
C.19.86
D.19.92
A.0
B.0.33
C.0.5
D.0.25
A.101.76
B.103.57
C.168.12
D.171.12
A.10.88
B.15.24
C.20.21
D.25.39
A.1.2米
B.1.5米
C.1.8米
D.2.0米
A.103.98
B.109.16
C.114.13
D.118.49
A.38.75
B.77.51
C.116.26
D.121.32
A.增加土方工程量
B.减少土方工程量
C.保证挖土的稳定性和安全性
D.提高施工效率