[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fEiHu8PIRBvzgYVO6lvE_eBM1x9nNvSq_zGjAZj1nZGI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2023-09-05 21:58:56",96308625,[8,9,10,11],"0.03%","0.07%","0.05%","0.01%",{"courseId":13,"courseImg":14,"courseName":15},"ffaa80805e1b93c440118dd3ed8b7330","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb3a5eb6177bf85ad556cb52c242afa2.jpg","分析化学及实验","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",[18,23,32,41,50],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],96308626,[27,28,29,30],"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":33,"createTime":5,"id":34,"options":35,"question":40,"source":21,"type":22},[],96308627,[36,37,38,39],"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":42,"createTime":5,"id":43,"options":44,"question":49,"source":21,"type":22},[],96308628,[45,46,47,48],"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":51,"createTime":5,"id":52,"options":53,"question":58,"source":21,"type":22},[],96308629,[54,55,56,57],"0.254651","0.25454","0.25465","0.254549","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"]