35.Which level of the temperature of scavenging air needs to be maintained to prevent corrosion by condensing acid liquid?
(A)The level above dew point.
(B)The level above flash point.
(C)The level above boiling point.
(D)The level above ambient temperature.

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統計： A(75), B(16), C(16), D(15), E(0) #1204966