【Daily Question】Production, Storage, and Transportation - 20190706

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One question per day on the production, storage, and transportation version; 5 wealth points are awarded for correct answers； Effective participation grants 2 units of wealth ； Extra points will be given to those who provide a reasonable explanation. Multiple-choice question: The washing rate of a plate and frame filter is 1/4 of the final filtration rate under constant pressure; this rule holds true only when ( ). 　　(A) The pressure difference during filtration is the same as that during washing ； 　　(B) The viscosity of the filtrate is the same as that of the washing solution ； 　　(C) The filtration pressure difference is the same as the washing pressure difference, and the viscosity of the filtrate is the same as that of the washing liquid ； 　　(D) The filtration pressure difference is the same as the washing pressure difference, the viscosity of the filtrate is the same as that of the washing liquid, and the filtration area is the same as the washing area. (D) The filtration pressure difference is the same as the washing pressure difference, the viscosity of the filtrate is the same as that of the washing liquid, and the filtration area is the same as the washing area.