单项选择题
A.50 B.60 C.80 D.100
A.60m B.80m C.100m D.120m
A.伸缩缝B.沉降缝C.防震缝D.以上三种
A.1m,2m,5m B.0.001m,0.002m,0.005m C.0.01m,0.02m,0.05m D.0.1m,0.2m,0.5m
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