The driving force for Filteration is generally referred to_______.过滤推动力一般是指_______。 ( ) A. Pressure difference between the two sides of the filter medium过滤介质两边的压差 B. The pressure difference between both sides of the filter layer formed by the filter medium and the filter cake过滤介质与滤饼构成的过滤层两边的压差 C. Pressure difference between the two sides of the filter cake滤饼两面的压差 D. Pressure difference between liquids entering into and flowing out of the filter液体进出过滤机的压差