[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f5CrXf_Sr1Vm6qY-iuyBMsGxbHGRW6kFTMRc0Dobg_gg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":14,"question":21,"related":22,"source":26,"type":27},[],"2025-12-08 23:30:22",253286580,[8,9,10,11,12,13],"Cu","Ru","Co","Pb","Ni","Rh",{"count":15,"courseId":16,"courseImg":17,"courseName":18,"workId":19,"workName":20},7,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_48670778","第五章 第三节 饰用钯及其合金材料","Pt-Pd二元合金强度硬度偏低,因此往往需要添加下列哪些元素来提高强度硬度",[23,28,37,46,54,59,64],{"answer":24,"createTime":5,"id":6,"options":25,"question":21,"source":26,"type":27},[],[8,9,10,11,12,13],"v1",1,{"answer":29,"createTime":5,"id":30,"options":31,"question":36,"source":26,"type":27},[],253286581,[32,33,34,35],"工艺性能总体比金、银、铂等贵金属稍差","钯金首饰的检测鉴定标准尚不成熟","易出现质量问题,返修率较高","钯金报价透明度不高","钯金首饰的局限性有哪些",{"answer":38,"createTime":39,"id":40,"options":41,"question":45,"source":26,"type":27},[],"2025-12-07 08:40:06",253286582,[42,43,44],"提高合金的抗晦暗能力","形成更饱和的白色","固溶强化","Pd以纯Pd或Pd-Ag等中间合金的形式作为合金元素加入Au、Ag和Pt等合金中,主要有哪几个方面的作用",{"answer":47,"createTime":39,"id":48,"options":49,"question":52,"source":26,"type":53},[],253286583,[50,51],"正确","错误","铂合金熔炼不能采用石墨坩埚,因为在熔融状态下,Pt和某些合金元素(如Pd)能溶解大量的碳,而在合金凝固过程中碳又以纤维状或片状的石墨形态析出在晶界上,进而使合金变脆",3,{"answer":55,"createTime":39,"id":56,"options":57,"question":58,"source":26,"type":53},[],253286584,[50,51],"钯添加到金中降低了合金的熔点",{"answer":60,"createTime":39,"id":61,"options":62,"question":63,"source":26,"type":53},[],253286585,[50,51],"Ag-Pd合金在液相和固相均无限互溶,弥散强化效果突出,因此钯对银的强化作用很好",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":26,"type":73},[],253286586,[68,69,70,71],"Ag与Pt中的Pt","Ag与Pt中的Ag","Ag与Pd中的Ag","Ag与Pd中的Pd","Ag与Pd,Ag与Pt两个组合,那一种组合中的哪种金属先被腐蚀",0]