Saturday, September 17, 2022
Monday, February 6, 2023
Friday, September 16, 2022
问题:为防止硫化物对锅炉尾部的腐蚀,同时降低热损失,排烟温度()...
Monday, September 12, 2022
问题:锅炉各部件间应预留一定的空隙或安装()等,防止由于膨胀而使锅炉受...
Monday, September 12, 2022
问题:离子交换树脂的全交换容量可用化学分析方法测定,也可通过树脂的结构...
Monday, September 12, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Monday, September 12, 2022
问题:配制溶液的溶剂,在没有注明其它要求时,均用()。...
Monday, September 12, 2022
Saturday, September 17, 2022
问题:在锅炉水质分析中,电位分析法主要用于测定水、汽的钠离子、硅酸根和铁离子的含量。...
Saturday, January 13, 2024
问题:将锅炉分为蒸汽锅炉、热水锅炉和汽水两用炉的依据是()...
Friday, September 16, 2022
问题:合理的定期排污操作,对两个排污阀总是先开启的先关,后开启的后关。...
Monday, September 12, 2022
问题:锅炉停用时发生腐蚀应具备的条件有有空气进入和()。...
Thursday, September 15, 2022
问题:当天然水中的总碱度>总硬度时,水中无永久硬度,有钠盐硬度,而且总...
Monday, September 12, 2022
问题:测定Na<sup>+</sup>时,应用二异丙胺或饱和氢氧化钡将...
Wednesday, September 14, 2022
Friday, September 16, 2022
问题:比色和分光光度法是基于物质对光的选择性吸收而建立起来的分析方法...
Monday, September 12, 2022