【Daily Question】Wastewater Knowledge - 088 (June 1) (2 points for answering, 4 points for a correct answer)
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Multiple-choice question: The filter media used in filters are usually a dual-layer medium composed of ( ) and quartz-based yellow sand. (A) Quartz sand (B) White coal (C) Coke (D) Silica sand Answer: (B) White coal
I’ve never come across this; I guess it’s A
Sure enough, it’s a group of @(B) white coal
@2887848 Ask Baidu
The filter media in filters are usually a dual-layer composition of ((A) quartz sand) and quartz-based yellow sand. (A) Quartz sand (B) White coal (C) Coke (D) Silica sand Answer: (A) Quartz sand
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The filter media in filters are usually composed of (B) and quartz-based yellow sand, forming a dual-layer filter medium. (A) Quartz sand (B) White coal (C) Coke (D) Silica sand Answer: B
The filter media in filters are usually composed of (B) and quartz-based yellow sand, forming a dual-layer filter medium.
The filter media in filters are typically composed of a double-layer medium made of (B) white coal and quartz sand.