[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fc8qiDtLlvKO0r2068nHjlYjCk-zRwCPZXq0vNqVY6eo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":29,"type":30},[],"2023-06-16 21:22:51",65942055,[8,9,10,11],"0.75-0.80","0.70-0.85","0.85-0.90","0.90-0.95",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},115,"c0ba4cab0b6df061ea74dddb1d49fbdc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe51be4de22ec2ce93c7ce215c7bb73f7.png","建筑材料与检测（22级工程技术）","work_28296179","学习任务三","经常位于水中或受潮严重的重要结构物的材料,其软化系数不宜小于( )",[21,31,40,49,58,67,76,85,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":28,"source":29,"type":30},[],65942048,[25,26,27],"吸水率与含水率之比","材料饱和水抗压强度与干燥抗压强度之比","材料受冻后的抗压强度与受冻前抗压强度之比","材料的耐水性可用软化系数表示,软化系数是( )","v1",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],65942049,[35,36,37,38],"209","209.5","210","211","含水率为5%的砂220kg,将其干燥后的重量是( )kg",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],65942050,[44,45,46,47],"&gt;90&deg;","&lt; 90&deg;","=0&deg;","&ge; 90&deg;","当材料的润湿边角.为( )时,称为憎水性材料",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],65942051,[53,54,55,56],"大孔","内部孔越细小","连通小孔","开口细孔","用于吸声的材料,要求其具有( )孔隙的多孔结构材料,吸声效果最好",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":29,"type":30},[],65942052,[62,63,64,65],"&ge;0.85","&lt;0.80","&gt;0.80","0.95","通常,材料的软化系数为( )时,可以认为是耐水的材料",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":29,"type":30},[],65942053,[71,72,73,74],"0.92","0.96","0.88","0.13","将一批混凝土试件,经养护至此28天后分别测得其养护状态下的平均抗压强度为23Mpa,干燥状态下的平均抗压强度为25Mpa,吸水饱和状态下的平均抗压强度为22Mpa,则其软化系数为( )",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":29,"type":30},[],65942054,[80,81,82,83],"质量吸水率","体积吸水率","孔隙水饱和系数","软化系数","下列概念中,( )表明材料的耐水性",{"answer":86,"createTime":5,"id":6,"options":87,"question":19,"source":29,"type":30},[],[8,9,10,11],{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":29,"type":30},[],65942056,[92,93,94,95],"质量吸水率为25%","质量吸水率为20%","体积吸水率为25%","体积吸水率为20%","某材料吸水饱和后的质量为20Kg,烘干到恒重时质量为16Kg,则材料的( )",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":29,"type":30},[],65942057,[101,102,103,104],"耐久性","强度和导热系数","密度","体积密度和导热系数","材料吸水后将材料的( )提高"]