[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fLwNlFkUkgZr2QRtUVrmwUuhE0plga9cFGbXSMnrWxhA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-09-05 21:58:56",96308629,[8,9,10,11],"0.254651","0.25454","0.25465","0.254549",{"courseId":13,"courseImg":14,"courseName":15},"ffaa80805e1b93c440118dd3ed8b7330","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb3a5eb6177bf85ad556cb52c242afa2.jpg","分析化学及实验","按四舍六入五成双规则将下列数据修约为四位有效数字(0.2546)的是",[18,29,38,47,56],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],96308625,[22,23,24,25],"0.03%","0.07%","0.05%","0.01%","某铵盐中氮的质量分数为5.15%、5.32%、5.22%、5.25%,其标准偏差为","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],96308626,[33,34,35,36],"1.2492%","1.249%","1.2%","1.25%","根据有效数字保留原则,下面计算式的正确结果是 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F009688350493295a12476685028cef10.png\">",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],96308627,[42,43,44,45],"1.26×10-11 mol•L-1","1×10-11 mol•L-1","1.3×10-11 mol•L-1","1.259×10-11 mol•L-1","已知某溶液的pH值为10.90,其氢离子浓度的正确值为",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],96308628,[51,52,53,54],"绝对误差是测量值与真值之差","相对误差是绝对误差在真值中所占的百分比","偏差是测量值与平均值之差","总体平均值就是真值","以下说法不正确的是",{"answer":57,"createTime":5,"id":6,"options":58,"question":16,"source":27,"type":28},[],[8,9,10,11]]