单项选择题
A.排架方向:Hc0=6m,Hc10=10.2m B.排架方向:Hc0=7.5m,Hc10=12.75m C.排架方向:Hc0=6m,Hc10=12.7m D.排架方向:Hc0=6m,Hc10=8.22m
A.311.56 B.346.17 C.384.64 D.427.40
A.3 B.4 C.5 D.6