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1. |
_Use of hydrated lime in water treatment$? |
A. | Before filtration, reduces the bacterial load on filters |
B. | After filtration, combats the corrosive-ness of water due to the presence of O‚ÇÇ & CO‚ÇÇ |
C. | Is to adjust the pH value |
D. | All of the above |
Answer» E. | |