大学职业资格刷题搜题APP
创建自己的小题库
搜索
【多选题】
下列关于石英砂滤料滤池冲洗原理的叙述中,正确的是( ) 。
A.
高速水流冲洗时，上升水流把滤层托起，使滤料相互摩擦，滤料表层污泥脱落随水流排出池外；
B.
气、水反冲洗时，上升的水流和空气一并作用把滤层托起，呈流态化状态，使之相互摩擦，滤料表层污泥脱落随水流排出池外；
C.
气、水同时反冲洗时滤层摩擦效果比单水冲洗滤层膨胀摩擦效果好；
D.
滤池冲洗时滤层膨胀率越大，摩擦作用越大，滤料表层污泥越容易脱落。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈
收藏
举报
参考答案：
举一反三
【单选题】When stars like our Sun die, they bloat to become red giants and then eject gigantic clouds of gas and dust into space. Increasingly, however, scientists found themselves at a profound loss to explain...
A.
explain-the possible way of death of our Sun.
B.
show the two types of red giants.
C.
discuss on the way of red giants to become white dwarfs.
D.
explore the origin of life.
相关题目：
【单选题】When stars like our Sun die, they bloat to become red giants and then eject gigantic clouds of gas and dust into space. Increasingly, however, scientists found themselves at a profound loss to explain...
A.
explain-the possible way of death of our Sun.
B.
show the two types of red giants.
C.
discuss on the way of red giants to become white dwarfs.
D.
explore the origin of life.
参考解析：
题目纠错 0
发布
