[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGTiVb4DkorD7_54Of0yr3piGfsUlp3u-3Dx7m_YriXQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":13,"question":17,"related":18,"source":22,"type":23},[],"2023-12-13 21:17:33",113804319,[8,9,10,11,12],"C","Si","S","P","Mn",{"courseId":14,"courseImg":15,"courseName":16},"af069bb411c94c52b41f5ed425c32f04","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb519eba16dd6cb040c4ee78aa9bc7cf6.png","装配式混凝土建筑施工","下列对钢材来说,属于有害元素的是( )",[19,24,34,44,54,64,73,83,93,102],{"answer":20,"createTime":5,"id":6,"options":21,"question":17,"source":22,"type":23},[],[8,9,10,11,12],"v1",1,{"answer":25,"createTime":5,"id":26,"options":27,"question":33,"source":22,"type":23},[],113804322,[28,29,30,31,32],"硫含量增加,高温时使钢材易热脆","磷含量增加,低温时使钢材易冷脆","碳含量增加,使强度提高,塑性、韧性、抗腐蚀性降低、可焊性降低","含硅适量,可提高钢材强度","含锰适量可使刚才强度提高,改善热加工性能","关于钢材化学成分的影响因素,下列说法正确的是( )",{"answer":35,"createTime":5,"id":36,"options":37,"question":43,"source":22,"type":23},[],113804323,[38,39,40,41,42],"强屈比是指屈服强度和抗拉强度之比,反应结构的储备能力","实际工程中以断面收缩率代表材料断裂前具有的塑性变形能力","断面收缩率越大,钢材的塑性越好","温度越低,冲击韧性越低","冷弯性能是判别钢材塑性变形能力和冶金质量的综合指标","关于钢材的力学性能,下列说法正确的是( )",{"answer":45,"createTime":5,"id":46,"options":47,"question":53,"source":22,"type":23},[],113804324,[48,49,50,51,52],"偏析","非金属夹杂","裂纹","气泡","分层","钢材冶金缺陷有",{"answer":55,"createTime":5,"id":56,"options":57,"question":63,"source":22,"type":23},[],113804325,[58,59,60,61,62],"化学成分","冶金缺陷","冷作硬化和时效硬化","应力集中和残余应力的影响","温度的影响","影响钢材机械性能的因素有( )",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":22,"type":23},[],113804326,[68,69,70,71],"焊接","螺栓连接","铆钉连接","钢丝绳或钢丝束连接","钢构件的连接方式有( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":82,"source":22,"type":23},[],113804328,[77,78,79,80,81],"轻质高强","塑性韧性好","抗火性能差","耐腐蚀性能好","材性好、可靠性低","下列属于钢结构优点的是( )",{"answer":84,"createTime":5,"id":85,"options":86,"question":92,"source":22,"type":23},[],113804331,[87,88,89,90,91],"重工业厂房","大跨度结构","轻型钢结构","高耸构筑物","塔吊","当前,钢结构主要应用在( )",{"answer":94,"createTime":5,"id":95,"options":96,"question":101,"source":22,"type":23},[],113804334,[97,98,99,100],"屈服点的字母Q","屈服点(厚度t&le;16mm)的数值","质量等级符号","脱氧方法符号","碳素结构钢的牌号由( )、( )、( )、( )按顺序组成",{"answer":103,"createTime":5,"id":104,"options":105,"question":110,"source":22,"type":23},[],113804336,[106,107,108,109],"F","Z","b","Tz","钢材按脱氧方法分为( )"]