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单选题
The procedures recommended for auxiliary boilers having high salinity include （）.
A
treating with oxygen scavengers
B
securing the boiler and giving it a blowing down
C
increasing the pH
D
reducing the phosphate level
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单选题If an operating auxiliary boiler has a water pH reading of 7, you should （）.A
bottom blow the boilerB
treat the water with caustic sodaC
treat the water with chemical scavengersD
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