[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fsb3o6XMwP_OYRgMVKZQqiMqBVzrVZXB7kLWQxe_5IXQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-07-01 23:01:08",133301444,[8,9,10,11],"酸性水溶液","碱性水溶液","纯水","有机溶剂",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"94fb49c8381b763a669e4514c507b488","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6270a9753ecbcafab85584ac2caf9e75.jpg","卫生化学","work_32787501","第二章作业","食品包装材料中的金属元素常用( )浸泡溶出",[21,33,36,45,54,60,65,70,75,80],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-07-01 15:56:44",133301442,[26,27,28,29],"溶液吸收法","滤纸和滤膜阻留法","以上方法都可以","固体吸附法","空气中气态、蒸气态和气溶胶物质样品可用( )采集","v1",0,{"answer":34,"createTime":5,"id":6,"options":35,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":37,"createTime":5,"id":38,"options":39,"question":44,"source":31,"type":32},[],133301446,[40,41,42,43],"5~10 L","2~3 L","20~40 L","10~20 L","一般理化分析的项目用水量约( )",{"answer":46,"createTime":47,"id":48,"options":49,"question":52,"source":31,"type":53},[],"2024-03-17 15:19:39",134378470,[50,51],"正确","错误","样品采集的原则可以概括为:代表性、典型性和适时性",3,{"answer":55,"createTime":56,"id":57,"options":58,"question":59,"source":31,"type":53},[],"2024-03-17 15:19:40",134378472,[50,51],"对于江、河水系或某一河段,根据河流的宽度和流量,要求设置对照断面、控制断面、削减断面三个断面,每个断面分别设置数个采样点",{"answer":61,"createTime":56,"id":62,"options":63,"question":64,"source":31,"type":53},[],134378475,[50,51],"样品水解法常用酸、碱、酶对样品进行水解,使被测成分释放出来",{"answer":66,"createTime":56,"id":67,"options":68,"question":69,"source":31,"type":53},[],134378477,[50,51],"液-液萃取法又称溶剂萃取法",{"answer":71,"createTime":56,"id":72,"options":73,"question":74,"source":31,"type":53},[],134378479,[50,51],"样品的采集在任何时间均可完成",{"answer":76,"createTime":56,"id":77,"options":78,"question":79,"source":31,"type":53},[],134378481,[50,51],"大气样品的采集方法可分为直接采集法和浓缩采集法",{"answer":81,"createTime":56,"id":82,"options":83,"question":84,"source":31,"type":53},[],134378483,[50,51],"常用的样品保存方法有:密封保存法、冷藏保存法、化学保存法"]