【单选题】对于电渗析处理方法不正确的说法是:
A.
电渗析是电场的作用下,利用阴、阳离子交换膜对溶液中的阴、阳离子悬着透过性,是溶质与水进行分离的一种物理化学过程。
B.
对处理的水不需要进行预处理,不需要进行软化、不需要去除钙、镁等离子。
【单选题】对于电渗析处理方法不正确的说法是()
A.
电渗析是在电场的作用下,利用阴、阳离子交换膜对溶液中的阴、阳离子选择透过性,使溶质与水进行分离的一种物理化学过程。
B.
对处理的水不需要进行预处理,不需要进行软化、不需要去除钙、镁等离子。
【单选题】Small farms and the lack of modern technology have ______ agricultural production.
【简答题】完形填空 For 52 years my father got up every morning at 5: 30 a. m., except Sunday, and went to work.I __ 1 __saw my father home from work ill.He had no hobbies, __ 2 __taking care of his family. For 22 y...
【简答题】For 52 years my father got up every morning at 5:30 a.m., except Sunday, and went to work. I__41__saw my father home from work ill. He had no hobbies, __42__taking care of his family. For 22 years, __...
【单选题】( )是技术含量高且集中的机电设备,是整个城市轨道交通系统中最关键的设备。