单选题For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable（）AthroughputBadditive percentCcetane numberDTBN number
单选题
For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable（）
A
throughput
B
additive percent
C
cetane number
D
TBN number
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