单项选择题
A.15~20mm B.20~25mm C.20~30mm D.25~30mm
A.0.4mm;10% B.0.5mm;10% C.0.6mm;10% D.0.5mm;15%
A.搬迁 B.搬迁、暴露悬吊或以其他 C.暴露悬吊 D.搬迁、暴露悬吊