判断题许可证制度是国家为加强环境管理而采用的一种行政管理制度。A 对B 错...
Sunday, October 15, 2023
Wednesday, September 21, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
问答题欲配5mol/L的H2SO4溶液5L,需用ρ=1.84g/cm3纯度95%的H2SO4多少毫升?...
Tuesday, December 20, 2022
Thursday, January 12, 2023
Thursday, September 22, 2022
填空题沉砂池处理废水属于废水第()级处理,向废水中加入硫酸铝主要是起()作用。...
Thursday, March 2, 2023
Tuesday, September 20, 2022
单选题Al3+能使铬黑T指示剂封闭,可加入()来消除干扰A KCNB NH4FC NH4CNSD 三乙醇胺...
Tuesday, January 23, 2024
Tuesday, April 4, 2023
判断题EDTA二钠盐溶于水后,其溶液的PH<7。A 对B 错...
Wednesday, May 24, 2023
Sunday, June 4, 2023
Wednesday, September 21, 2022
单选题由于粉煤灰含有大量(),因此它可以作为建材工业的原料使用A CaO和SiO2B CaO和Al2O3C SiO2和Al2O3D MgO和CaO...
Thursday, August 17, 2023
Wednesday, September 21, 2022
Sunday, June 4, 2023
Wednesday, September 21, 2022
在允许范围内增高烟囱高度,可使烟气更广泛地扩散,减小了当地污染程度。...
Tuesday, September 20, 2022
Thursday, September 15, 2022