A.35MPa
B.45MPa
C.55MPa
D.65MPa
A.35MPa
B.45MPa
C.55MPa
D.65MPa
A.10
B.15
C.20
D.25
A.20MPa
B.25MPa
C.30MPa
D.35MPa
A.15MPa
B.25MPa
C.30MPa
D.35MPa
A.20MPa
B.30MPa
C.40MPa
D.50MPa
A.5
B.10
C.15
D.20
A.25MPa
B.30MPa
C.35MPa
D.40MPa
A.因为45MPa是国际通用标准
B.因为45MPa确保路床有足够的承载能力
C.因为45MPa更易于施工
D.因为45MPa能减少施工成本
A.GB/T50329
B.CJJ169-2012
C.JT/T256
D.CECS129