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当石英砂滤池滤料采用单水反冲洗时,反冲洗强度、水头损失和滤料层的状态有如下关系,其中正确的观点是下列哪项?

A.
滤层处于流态化后,冲洗强度增加,水头损失等比例增加;
B.
滤层处于流态化后,冲洗强度增加,不利于洗脱滤料表面的污泥;
C.
滤层处于流态化后,滤料粒径越大,所需要的冲洗强度越大;
D.
滤层处于流态化前,冲洗强度增加,水头损失等比例增加
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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.
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【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.
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