[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fS50LNXR5614_lui_pKI-doynewPISklPra_hkxtk4ns":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-11-16 13:07:20",234991753,[8,9,10,11],"1,2","3,4","2,3","1,4",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},35,"fd803185e5d7f049208d30a1d2f45141","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fed5e1ec4c4cf4e79f6685c64b7bbbd46.jpg","无机及分析化学","work_48219432","第九次作业20251115","以下产生误差的四种表述中,属于随机误差的是( )(1) 指示剂变色点与化学计量点不一致(2) 滴定管读数最后一位估计不准(3) 称量过程中天平零点稍有变动(4) 天平的砝码未经校准",[21,32,41,44,52,61,70,79,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],234991751,[25,26,27,28],"做对照实验","校正仪器","做空白实验","增加平行测定次数","下列不属于减少系统误差的方法的是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],234991752,[36,37,38,39],"滴定过程中,滴定剂不慎滴在外面","试剂中含有微量杂质干扰主反应","待测试液未混合均匀","砝码读错","下列情况中属于系统误差的是( )",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":51,"source":30,"type":31},[],234991754,[48,26,49,50],"对照试验","空白试验","适当增加平行测定次数","偶然误差可通过( )方法减免",{"answer":53,"createTime":5,"id":54,"options":55,"question":60,"source":30,"type":31},[],234991755,[56,57,58,59],"若测定的随机误差小,则精密度和准确度一定高","一定置信度下以测定平均值为中心包括真值的范围","有效数字是指能够由仪器直接读出来的数字","纯度达到99.99%以上的物质均可以作为基准物质","下列说法正确的是( )",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":30,"type":31},[],234991756,[65,66,67,68],"0.04099","0.04","0.0409","0.041","分析某一试样含硫量,称取试样3.5g,分析结果报告合理的为( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":30,"type":31},[],234991757,[74,75,76,77],"系统误差和操作误差","随机误差和方法误差","仪器误差和试剂误差","系统误差和随机误差","误差按其来源和性质可以分为两大类,它们是( )",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":30,"type":31},[],234991758,[83,84,85,86],"滴定管的粗细不均匀","锥形瓶的体积不准确","所用纯水中含有干扰离子","滴定管旋塞漏液","分析测定中,下列情况属于随机误差的是( )",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":30,"type":31},[],234991759,[92,93,94,95],"∑Ea =0","∑di =0","Er=(x\u002FEa)×100%","dr =(di \u002Fx)×100%","Ea、Er、di、dr 分别表示每个测定值的绝对误差、相对误差、绝对偏差、相对偏差,则下列关系式正确的是( )",{"answer":98,"createTime":5,"id":99,"options":100,"question":104,"source":30,"type":31},[],234991760,[101,102,103,28],"做对照试验","做空白试验","校准仪器","为了减小测量中的随机误差,应该采取的措施是( )"]