单项选择题
A.分仓缝 B.构造缝 C.变形缝 D.伸缩缝
A.1级 B.2级 C.3级 D.4级
A.180mm B.160mm C.120mm D.150mm
A.4m~6mB.5m~9mC.4m~7mD.5m~8m
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