A.33.0MPa
B.34.0MPa
C.34.935MPa
D.35.0MPa
A.33.0MPa
B.34.0MPa
C.34.935MPa
D.35.0MPa
A.30.30
B.32.58
C.34.50
D.34.94
A.C30
B.C25
C.C20
D.C15
A.C30
B.C40
C.C50
D.C60
A.C30
B.C40
C.C35
D.C50
A.C20
B.C30
C.C35
D.C40
A.C15
B.C20
C.C25
D.C30
A.因为成本低
B.因为施工方便
C.因为确保结构安全和耐久性
D.因为节省时间
A.C25
B.C30
C.C35
D.C40