[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fnLAkkl_ZQnH4aZ3BqYqRJDNICciRzTJHyJN7sw6zFe0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":26,"type":27},[],"2023-09-26 22:20:23",98455966,[8,9,10,11],"废钢","回炉铁","焦炭","新生铁",{"courseId":13,"courseImg":14,"courseName":15},"6ff62bf2880a7c52e0e324d092cc1088","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5aa1e010016a00d72d96151e16aafd59.png","工程训练C","冲天炉熔炼过程中,为了降低铁水中的含碳量,常在炉料中加入一定量的()",[18,28,31,39,49,59,69,78,86,95],{"answer":19,"createTime":5,"id":20,"options":21,"question":25,"source":26,"type":27},[],98455964,[22,23,24],"不同","相同","可相同可不同","同一砂型中各处型砂紧实度()","v1",0,{"answer":29,"createTime":5,"id":6,"options":30,"question":16,"source":26,"type":27},[],[8,9,10,11],{"answer":32,"createTime":5,"id":33,"options":34,"question":38,"source":26,"type":27},[],98455967,[35,36,37],"增加耐火性","增加透气性","增加强度","大型型芯中放焦炭的目的之一是()",{"answer":40,"createTime":41,"id":42,"options":43,"question":48,"source":26,"type":27},[],"2023-09-30 21:12:49",98455968,[44,45,46,47],"表面粘砂","气孔","砂眼、夹砂","浇不足","砂型强度低时,除造成胀砂、塌箱外,还会使铸件产生()",{"answer":50,"createTime":51,"id":52,"options":53,"question":58,"source":26,"type":27},[],"2023-09-27 22:38:45",98572628,[54,55,56,57],"自行车中轴","机床丝杠","车床上进刀手轮","螺栓","下列工件中适宜用铸造方法生产的是()",{"answer":60,"createTime":61,"id":62,"options":63,"question":68,"source":26,"type":27},[],"2023-10-06 11:49:34",98572629,[64,65,66,67],"粘砂、硬皮","气孔、浇不足","应力、变形","裂纹","砂型透气性差,除了会呛火外,还会产生()",{"answer":70,"createTime":51,"id":71,"options":72,"question":77,"source":26,"type":27},[],98572630,[73,74,75,76],"均匀一致","下型比上型紧实度要大","上型比下型紧实度要大","由操作者自定","舂砂时,上下砂型的型砂紧实度应该()",{"answer":79,"createTime":51,"id":80,"options":81,"question":85,"source":26,"type":27},[],98572631,[82,83,84],"型砂退让性不足","修型时刷水过多","型砂强度太高","下列三种情况中引起气孔的原因是()",{"answer":87,"createTime":41,"id":88,"options":89,"question":94,"source":26,"type":27},[],98730509,[90,91,92,93],"小的偏析性","好的流动性","高的熔点","小的收缩性","为了获得外形完整、轮廓清晰的铸件,要求铸造合金具有( )",{"answer":96,"createTime":97,"id":98,"options":99,"question":104,"source":26,"type":27},[],"2023-09-30 20:25:48",98730510,[100,101,102,103],"增加退让性","防止粘砂","防止气孔","改善透气性","制好的砂型,通常要在型腔表面涂上一层涂料,其目的是()"]