[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjdW2wXN5QQwDc4aNd4vP_jxlnGg-MEBJxcY-WVBMP68":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":27,"type":28},[],"2025-06-05 21:23:48",194958958,[8,9,10,11],"强度较低","刚度较低","硬度较低","韧性较低",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},361,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_44114511","作业成本法测试","材料性能实验测得A k =5 J,结论应该是",[21,29,38,43,48,57,66,75,84,87],{"answer":22,"createTime":5,"id":23,"options":24,"question":26,"source":27,"type":28},[],194958950,[8,9,10,25],"塑性较低","材料性能实验测得HRA =30,结论应该是","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],194958951,[33,34,35,36],"维氏硬度","布氏硬度","洛氏硬度","肖氏硬度","HV49表示的什么硬度",{"answer":39,"createTime":5,"id":40,"options":41,"question":42,"source":27,"type":28},[],194958952,[8,9,10,25],"材料性能实验测得HRA =10,结论应该是",{"answer":44,"createTime":5,"id":45,"options":46,"question":47,"source":27,"type":28},[],194958953,[8,9,10,25],"材料性能实验测得HB =10,结论应该是",{"answer":49,"createTime":5,"id":50,"options":51,"question":56,"source":27,"type":28},[],194958954,[52,53,54,55],"钢球","硬质合金球","金刚石","淬火钢球","维氏硬度采用什么压入体",{"answer":58,"createTime":5,"id":59,"options":60,"question":65,"source":27,"type":28},[],194958955,[61,62,63,64],"材料抵抗冲击载荷作用而不破坏的能力称为冲击韧性","材料抵抗内部裂纹失稳扩展的能力称为断裂韧性","材料断裂韧性值以试件缺口处截面面积的能量表示","材料冲击韧性值以试件缺口处单位截面面积的能量表示","下列关于韧性的说法,错误的是",{"answer":67,"createTime":5,"id":68,"options":69,"question":74,"source":27,"type":28},[],194958956,[70,71,72,73],"疲劳载荷一定是大于屈服应力的载荷","疲劳载荷一定是大于弹性极限的载荷","疲劳破坏的裂纹源总是在零件表面","疲劳载荷一定是交变载荷","关于疲劳断裂,下面哪种说法是正确的",{"answer":76,"createTime":5,"id":77,"options":78,"question":83,"source":27,"type":28},[],194958957,[79,80,81,82],"抵抗弹性变形的能力","抵抗断裂破坏的能力","抵抗局部塑性变形的能力","抵抗冲击载荷的能力","下面哪一项是材料冲击韧性的定义",{"answer":85,"createTime":5,"id":6,"options":86,"question":19,"source":27,"type":28},[],[8,9,10,11],{"answer":88,"createTime":5,"id":89,"options":90,"question":95,"source":27,"type":28},[],194958959,[91,92,93,94],"长试样为试样长度为试样横截面半径的10倍","长试样为试样长度为试样横截面直径的10倍","短试样为试样长度为试样横截面直径的10倍","短试样为试样长度为试样横截面半径的20倍","关于长短试样说法正确的是"]