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60【单选题】遇火时发泡膨胀,具有优异的防火、水密、气密性能,尤其适合需经常更换或曾减电缆、管道的场合的是___
A. 有机防火堵料
B. 无机防火堵料
C. 防火包
D. 防火板材
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A
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A. 终凝前
B. 终凝后
C. 初凝前
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71【单选题】现浇钢筋混凝土楼盖施工中,梁的跨度为6m,板的跨度为4m,当设计无特别要求时,楼盖拆模时现场混凝土强度应达到设计强度的___%。
A. 50
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79【单选题】关于地下工程防水混凝土配合比的说法,正确的是___。
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B. 水胶比不得大于0.45
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88【单选题】关于墙体部位脚手眼设置位置的说法,错误的是___
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B. 屋面保温材料必须在环境温度零度以上施工
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90【单选题】设计无要求时,现浇混凝土结构拆模的顺序是___。
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92【单选题】对于不能同时砌筑的砖砌体,在必须留置的临时间断处应___
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