2021年河北省年上半年水质检验中级工技能操作试题.pdf

资料收集于网络如有侵权请联系网站删除谢谢精品文档河北省 2017 年上半年水质检验中级工技能操作试题一、单项选择题（共25 题，每题 2 分，每题的备选项中，只有1 个事最符合题意）1、下列反应中，硫酸不作氧化剂的是（）。A.A B.B C.C D.D 2、乙酸铅试纸用以检验痕量的_。A氨气B硫化氢C氯气D氯化氢3、洗涤氧化性物质常用 _。A碱性洗液B醇酸洗液C乙醇D酸性草酸4、用摩尔法测定Cl-，在做指示剂空白校正时，加入少许CaCO3固体的作用是_。A调整溶液的 pH 值B使干扰形成沉淀C制成相似于实际滴定的浑浊溶液D加深形成沉淀的颜色5、HPLC 检测器应使检测器 _与连接管及其配件的直径尽可能的小，否则会引起谱带柱外扩展。A柱径B柱体积C泵容量D液槽体积6、测定蒸馏水的 pH 值时，应选用 _的标准缓冲溶液。ApH=3.56 BpH=4.01 CpH=6.86 DpH=9.18 7、原子荧光检测电路中前置放大器的作用是将_。A电流转变为电压B电压转变成电流C放大电流D放大电压8、下列溶液浓度与溶质的溶解度可以换算的是_。精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页，共 7 页资料收集于网络如有侵权请联系网站删除谢谢精品文档A浓溶液B稀溶液C饱和溶液D任何溶液9、沉淀滴定法属于 _。A重量分析法B滴定分析法C酸碱滴定法D络合滴定法10、水的硬度主要是指水中含有_的多少。A氢离子B氢氧根离子C可溶性硫酸根离子D可溶性钙盐和镁盐11、络合滴定法对络合反应速度的要求是_。A足够快B足够慢C不能太快D不能太慢12、纯净的水在水层浅时为 _。A浅蓝色B无色C蓝色D黄色13、色谱法是一种 _分离方法。A物理B化学C化学物理D机械14、准确度和精密度的正确关系是_。A准确度不高，精密度一定不会高B准确度高，要求精密度也高C精密度高，准确度一定高D两者没有关系15、HPLC 的固定相主要采用310_的微粒。Anm Bm Cmm DA 16、氩氢火焰的温度约在 _。A580B680C780D880精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页，共 7 页文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5资料收集于网络如有侵权请联系网站删除谢谢精品文档17、在温度一定的情况下，银-氯化银电极的电位主要取决于_的浓度。ACl-BH+CHgCl2 DAg 18、CJ 302093生活饮用水水源水质标准规定二级水源水耗氧量(KMnO4法)的范围是 _mg/L。A3 B4 C6 D8 19、国外某些原子荧光一次最多可测_种元素。A3 B6 C9 D12 20、缓冲容量是指 1L 缓冲溶液的 pH 值改变 1 个单位时所需加入强酸或强碱的_。A体积B克数C摩尔数DpH 值21、保存金属钠的方法是 _。A放在水中B放在煤油中C放在棕色瓶中D放在酒精中22、证明氨水是弱碱的事实是_。A氨水的导电性比NaOH 溶液弱得多B氨水只能和强酸发生反应CNH4Cl 水溶液的 pH 值小于 7 D0.01mol/L 氨水的 pH 值为 12 23、光电池随温度的变化相对较慢，温度每增加1，光电流增加 _。A2A B2mA C2A D200mA 24、测定铜离子时选用的波长为_。A510nm B600nm C610nm D420nm 25、把铁片投到下列各物质的溶液中，铁片溶解，且溶液质量减少的是_。A硫酸精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页，共 7 页文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5资料收集于网络如有侵权请联系网站删除谢谢精品文档B硫酸铝C硫酸铁D硫酸铜二、多项选择题（共25 题，每题 2 分，每题的备选项中，有2 个或 2 个以上符合题意，至少有 1 个错项。错选，本题不得分；少选，所选的每个选项得0.5 分）1、量取 45mL 水，最好用 _的量筒。A50mL B100mL C25mL D20ml 2、通常化学反应速度的单位是_。Amol/L Bmol/（Ls）Cmol/min Dmol/s 3、从原理上离子色谱固定相可分为_类。A1 B2 C3 D4 4、参比电极与指示电极的不同点是_不同。A原理B结构C使用方法D作用5、_对水厂的工作质量和净水水质负全面责任。A正厂长B主管质量的副厂长C总工程师D生产工人6、下列各组物质混合后，溶液质量不发生改变的是_。AKOH 溶液和盐酸BBaCl2 和稀 H2SO4 CNa2CO3溶液和盐酸DFe和 Cu(NO3)2 溶液7、下列晶体中，组成晶体的微粒是离子的是_。A二氧化碳B二氧化硅C食盐D铝合金8、表示“水介质与氢离子反应的定量能力”的英文单词是_。Aacidity Balkalinity Caggressivity 精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 4 页，共 7 页文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 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ZI4R1A4X2Q5资料收集于网络如有侵权请联系网站删除谢谢精品文档Dchlorine 9、质量检验对水厂生产的重大作用在于对_起到把关、预防和反馈的作用。A出厂水B原水C管网水D后续供水10、铁是水中常见的杂质，本身并无毒性，它是_元素之一。A人体必须的营养B人体不需要的C对人体无害无益的D对人体可有可无的11、在 Excel 中，并不是所有命令执行以后都可以撤销，_操作执行后可以撤销。A插入工作表B复制工作表C删除工作表D清除单元格12、由分析操作过程中某些不确定的因素造成的误差称为（）。A、绝对误差 B、相对误差 C、系统误差 D、偶然误差13、氯仿遇紫外线和高热可形成光气，毒性很大，可在储存的氯仿中加入1%2%的_消除。A抗坏血酸B碳酸钠C乙醇D三乙醇胺14、GB/T 18920-2002城市污水再生利用城市杂用水水质规定冲厕水BOD5为_。A5mg/L B10mg/L C50mg/L D20mg/L 15、在下列物质中，可以和氨水组成缓冲溶液的是_。ANH4Cl BNa2CO3 CNaCl DNH4HCO3 16、原子荧光分析中，能用于将2 价铅氧化为 4 价铅的氧化剂是 _。A双氧水B过硫酸铵C铁氰化钾D亚铁氰化钾17、测水样的 pH 值时，所用的复合电极包括_。精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 5 页，共 7 页文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5资料收集于网络如有侵权请联系网站删除谢谢精品文档A玻璃电极和甘汞电极BpH 电极和甘汞电极C玻璃电极和银-氯化银电极DpH 电极和银-氯化银电极18、下列说法中违背非晶形沉淀条件的是_。A沉淀应在热的溶液中进行B沉淀应在浓的溶液中进行C沉淀应在不断搅拌下迅速加入沉淀剂D沉淀应放置过夜使沉淀陈化19、下列物质能共存于同一溶液中的是_。ANaCl，MgCl2 BBaCl2，H2SO4 CCa(OH)2，H3PO4 DAgNO3，FeCl3 20、原子荧光法测铅时，水样及标准系列中加入草酸和硫氰酸钠的作用是_。A掩蔽共存的干扰物质B彻底消除硝酸的干扰C将 Pb()氧化为 Pb()D将 Pb()转化为 Pb()21、经硝酸高氯酸混合液消解的水样，冷却后加入盐酸溶液的目的是_。A将水样进一步消解B增加残渣的溶解度C将 Se()还原成 Se()D调整 pH 值22、当用酸度计测量离子的活度时，需配用金属电极或_电极。A玻璃B离子选择C惰性D铂23、关于蠕动泵的维护，下列描述不正确的是_。A使用泵管时，不要让泵空转运行B使用一段时间后的泵管应该全部废弃，防止影响精度C使用泵管时要注意泵管压力的松紧程度是否合适D为保护泵管，使用时应随时向泵管和泵头的间隙滴加硅油24、在用碘量法滴定过程中，淀粉溶液应在滴定_加入。A前B过程中C到近终点时D任意时刻25、斜管沉淀池的主要优点是水利条件好，沉淀效率高，单位面积的处理水量为平流沉淀池的 _倍左右。A1 B3 C5 精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 6 页，共 7 页文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 ZI4R1A4X2Q5文档编码:CM9S7A10G1M2 HS5G5Y1P4V2 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