[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f_HdKa3xcKyhiH4IDNl1kGBBDnkrO0oFjm4oVSJTmyLs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":18,"related":19,"source":30,"type":31},[],"2025-12-05 10:44:09",251378698,[8,9,10],"增加耐火性","增加强度","增加透气性",{"count":12,"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},43,"6ff62bf2880a7c52e0e324d092cc1088","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5aa1e010016a00d72d96151e16aafd59.png","工程训练C","work_40236978","5 铸造章节作业","大型型芯中放焦炭的目的之一是()",[20,32,41,50,53,61,69,77,86,95],{"answer":21,"createTime":22,"id":23,"options":24,"question":29,"source":30,"type":31},[],"2025-05-12 00:13:56",187162178,[25,26,27,28],"响应","负载","电源","中间环节","激励而在电路中产生的电压和电流称为()","v1",0,{"answer":33,"createTime":22,"id":34,"options":35,"question":40,"source":30,"type":31},[],187162179,[36,37,38,39],"电荷","电压","电流","电阻","单位时间流过电路中某一截面的净电荷量称为()",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],251378697,[45,46,47,48],"浇不足","表面粘砂","气孔","砂眼、夹砂","砂型强度低时,除造成胀砂、塌箱外,还会使铸件产生()",{"answer":51,"createTime":5,"id":6,"options":52,"question":18,"source":30,"type":31},[],[8,9,10],{"answer":54,"createTime":5,"id":55,"options":56,"question":60,"source":30,"type":31},[],251378699,[57,58,59,47],"缩孔","夹渣","裂纹","型砂中加入水分过多,型砂湿度太大,铸件可能产生()",{"answer":62,"createTime":5,"id":63,"options":64,"question":68,"source":30,"type":31},[],251378700,[59,65,66,67],"粘砂、硬皮","应力、变形","气孔、浇不足","砂型透气性差,除了会呛火外,还会产生()",{"answer":70,"createTime":5,"id":71,"options":72,"question":76,"source":30,"type":31},[],251378701,[73,74,75],"提高砂型的强度","提高型砂的退让性和透气性","便于起模","型砂中加入木屑的目的是为了()",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],251378702,[81,82,83,84],"冷隔越严重","气孔越高","容易浇不足","组织越粗大","铸件的壁越厚,其强度越低,这主要是由于壁越厚()",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],251378703,[90,91,92,93],"焦炭","废钢","新生铁","回炉铁","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()",{"answer":96,"createTime":5,"id":97,"options":98,"question":101,"source":30,"type":102},[],251378704,[99,100],"正确","错误","负压实型铸造容易产生气孔、渗碳、错箱、砂眼等缺陷",3]