单选题水中镁离子主要是由含CO2的水溶解了地层中的()所致。A 石灰石B 石膏C 白云石...
Saturday, June 3, 2023
Thursday, September 22, 2022
Saturday, September 17, 2022
Thursday, September 22, 2022
Monday, September 19, 2022
氧化沟用于要求出水水质较严或有脱氮要求的中小型污水处理厂,设计有效水深宜为()...
Thursday, September 22, 2022
Monday, September 19, 2022
Saturday, September 17, 2022
在城市生活污水的典型处理流程中,隔栅,沉淀,气浮等方法属于下面的哪种方法()。...
Tuesday, September 20, 2022
()对污泥颗粒化的影响表现在两方面:一是对颗粒化进程的影响;二是对颗粒污泥活性的影响。...
Friday, September 16, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
某单位的接触氧化池进水和出水在上面,中间是填料层,下面是推流式曝气机。水流运动是水平的,几乎没有脱氮效果,是不是进水和出...
Thursday, September 22, 2022
Tuesday, September 20, 2022
当泵的轴线高于水池液面时,为防止发生气浊现象,所允许的泵轴线距吸水池液面的垂直高度为()。...
Saturday, September 17, 2022
泵在封闭运行时,泵体温度会迅速上升,泵内液体的蒸气压降增高,导致()的发生。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Saturday, September 17, 2022