单项选择题
A.+5mm,-3mm B.+5mm,-5mm C.+8mm,+3mm D.+8mm,-5mm
A.裂缝宽度不大于0.25mm B.裂缝宽度不大于0.2mm C.裂缝宽度不大于0.15mm D.裂缝宽度不大于0.1mm
A.15mm B.20mm C.25mm D.30mm
A.100m,5% B.150m,10% C.200m,15% D.250m,20%
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