单选题When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.Aslightly acidicBslightly alkalineCno saltyDslightly bitter
单选题
When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.
A
slightly acidic
B
slightly alkaline
C
no salty
D
slightly bitter
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