When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.<br>A:to cut down the amount of cooling water needed<br>B:to prevent an excess amount of cooling water from being discharged to the bilges<br>C:to supply hot water to the evaporator for more economical operation<br>D:None of the above is tree

When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A:to cut down the amount of cooling water needed
B:to prevent an excess amount of cooling water from being discharged to the bilges
C:to supply hot water to the evaporator for more economical operation
D:None of the above is tree

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