单项选择题
A.比立杆提前 B.随立杆同步 C.立杆搭设完成后 D.稍微晚于立杆
A.5%,60mm B.5‰,60mm C.5%,80mm D.5‰,80mm
A.10 B.15 C.20 D.25
A.85% B.90% C.95% D.100%
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