单项选择题
A.60mm B.70mm C.80mm D.100mm
A.900mm B.1000mm C.1100mm D.1200mm
A.基础大放脚应超过基础材料刚性角范围 B.基础大放脚与基础材料刚性角一致 C.基础宽度应超过基础材料刚性角范围 D.基础深度应超过基础材料刚性角范围