【判断题】
62.在络合滴定中，溶液的酸度对测量将产生影响。 ( )
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【判断题】
63.过滤水样的化学耗氧量反映了水中可溶性有机物的含量。 ( )
【判断题】
65.硼砂缓冲溶液不宜用玻璃瓶贮存。 ( )
【判断题】
66.测定硫酸根时，水样中的有机物将有利于硫酸钡沉淀完全。 ( )
【判断题】
67.磷钼蓝比色法适用于磷酸根为2～50mg/L的水样。( )
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68.测定水中Cl－浓度，可采用银量法或pCl电极法。 ( )
【判断题】
69.每个方法的检出限和灵敏度是表示该方法对待测物测定的最小浓度。 ( )
【判断题】
70.随着溶液浓度的提高，对某一波长范围的光吸收越强。 ( )
【判断题】
71.非单色光和溶液中的副反应可引起比耳定律移离。 ( )
【判断题】
72.分光光度法比目视比色法准确度高，选择性好，是因为它采用的入射光的单色性好。 ( )
【判断题】
73.测定水样碱度时，若水样中含有较多的游离氯，可加硝酸银以消除干扰。 ( )
【判断题】
74.重量法测硫酸盐含量时，生成的沉淀的灼烧温度应高于900℃。 ( )
【判断题】
75.用邻菲罗啉分光光度法测铁时，应先加入邻菲罗啉，后调溶液的pH值。 ( )
【判断题】
76.摩尔吸光系数的大小与入射光的波长有关。 ( )
【判断题】
77.水样中酚酞碱度与全碱度相等时，说明只有HCO3-存在。( )
【判断题】
78.摩尔吸光系数越大，表明该有色物质对此小波长光的吸收能力越强。 ( )
【判断题】
79.弱电解质在溶液中不完全电离，所以其溶液不导电。 ( )
【判断题】
80.相同的比色皿的透光率之差应小于0.5%。 ( )
【判断题】
81.pH计中起盐桥作用的是甘汞参比电极。 ( )
【判断题】
82.用混凝沉淀法处理废水时，应考虑混凝剂的选择和最佳投药量。 ( )
【判断题】
83.在滴定过程中，指示剂发生颜色变化的转变点叫反应的理论终点。 ( )
【判断题】
84.EDTA滴定钙离子时，应在强酸溶液中进行。 ( )
【判断题】
85.在进行硬度测定时，对碳酸盐硬度较高的水样，在加入缓冲溶液前应先稀释。 ( )
【判断题】
86.磷钼钒的黄色较稳定，在室温下不受其他因素的影响。 ( )
【判断题】
87.pNa5的标准溶液只能用来复核钠度计，不能作复定位液使用。 ( )
【判断题】
88.重铬酸钾快速法测水中COD时，氯离子对测量结果无影响。 ( )
【判断题】
89.系统误差、过失误差、随机误差都是遵从正态分布的。 ( )
【判断题】
90.测定钙硬度时，需控制溶液的pH值为10。 ( )
【判断题】
91.定期排污通常是在锅炉热负荷高时进行。 ( )
【判断题】
92.离子交换树脂只是用来去除水中的硬度。 ( )
【判断题】
93.电力系统稳定运行时，发电机发出总功率与用户消耗总功率相等。 ( )
【判断题】
94.当强碱溅到眼睛时，应立即送医务所急救。 ( )
【判断题】
95.任何人都可以搬运和使用浓酸或浓碱性药品。 ( )
【判断题】
96.联氨在搬运和使用时，必须放在密封的容器内，不准与人体直接接触。 ( )
【判断题】
97.主蒸汽管道保温后，可以防止热传递过程的发生。 ( )
【判断题】
98.随机误差和系统误差是决定实验结果准确程度的因素。 ( )
【单选题】
持有PMP证书的项目管理工作者,在管理项目的过程中,必须遵守以下哪个文件中的规定?（ ）
A. PMI的《项目管理知识体系指南》( PMBOK指南)
B. PMI的《项目集管理标准
C. PMI的《组织级项目管理成熟度模型》(OPM3)
D. PMI的《道德与专业行为规范》
【单选题】
某公司正在召开一个项目选择会议,要确定拟在后三年上马的一系列项目。参会者对各候选项目与公司战略目标的关系以及各项目的重要性展开了热烈讨论。会议将形成一份候选项目的优先级排序清单。参会者正在做:（ ）
A. 项目组合管理
B. 组织级项目管理
C. 项目集管理
D. 项目资源管理
【单选题】
在实施项目的过程中,应该认真考虑项目产品的维护与持续运营问题这种护维与持续运营应该：（ ）
A. 是项目收尾阶段的一项重安活动
B. 是项目生命周期中的一个阶段,因为生命周期成本中包括维护和持续运营成本
C. 不是项目的一部分
D. 是一个独立的项目
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