[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fXpnFZGkbw6KWMCmBGusQjZsXOPuYqes9zdiYH_Vx_Fw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-05 15:01:10",251574159,[8,9,10,11],"氮气","氢气","氩气","氧气",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","63115d17e8384091a7ad10381de76665","第八次作业0410","铝合金熔体在浇铸之前需要进行精炼处理,脱除熔体中含有的气体,这里的气体主要是指.( )",[21,32,38,47,56,65,74,83,86,95],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],251574152,[25,26,27,28],"232℃","648.8℃","660℃","1083℃","金属的熔点是非常重要的基本性质,也是重要的冶金参数,请问电解铝的熔点一般为多少?( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":37,"source":30,"type":31},[],251574153,[10,9,8,36],"氯气","以下气体中哪一种通常不能用于铝液精炼.( )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":30,"type":31},[],251574154,[42,43,44,45],"能够减少铝冶炼环节的能耗","能够减少对自然矿石的依赖","能够产生较为显著的经济价值","废铝合金不能回到原铝的冶炼流程中,必须单独冶炼","报废的铝合金回收利用的价值是比较高的,但是它的再生冶金相比于钢铁材料具有明显的特点,请指出下面的选项哪一个属于铝合金再生冶金独有的特点.( )",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":30,"type":31},[],251574155,[51,52,53,54],"Na和K","Zn","Si","Fe","再生铝液中往往含有较多的杂质需要精炼,可以把氯气和氩气的混合气体通入到铝液中达到精炼的目的,下面哪些元素可以通过这种方法去除.( )",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":30,"type":31},[],251574156,[60,61,62,63],"火焰切割","切割片切割","机械剪切","手工锯断","大批量的铝合金小型废料如果需要分割,那么采用以下哪种方法比较合适? ( )",{"answer":66,"createTime":5,"id":67,"options":68,"question":73,"source":30,"type":31},[],251574157,[69,70,71,72],"2.5-3.5","6.5-7.5","11-13","20-22","铝合金汽车轮毂主要使用的合金牌号为A365.2,请问它的含硅量大约处于哪个范围?( )",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":30,"type":31},[],251574158,[78,79,80,81],"铝锌系","铝铜系","铝镁系","铝硅系","下面哪种铸造铝合金是产量最高、应用最广的种类?( )",{"answer":84,"createTime":5,"id":6,"options":85,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],251574160,[90,91,92,93],"⑥①④⑤③②","④①③⑤⑥②","⑥④①②③⑤","④①⑥②③⑤","废铝再生火法冶炼工艺的一般流程顺序为( ):①熔炼,②精炼,③合金配比,④配料,⑤铸锭,⑥预处理",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],251574161,[99,100,101,102],"过滤","通入惰性气体","真空精炼","盐类精炼","在铝液的精炼过程中,如果想要去除氧化铝夹杂,那么应该采用下面哪种方法最合理.( )"]