单选题A mixture of 45%cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil √The sample can be described as having a/an（）Acetane number of 55Bcetane number of 45Coctane number of 55Doctane number of 45
单选题
A mixture of 45%cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil √The sample can be described as having a/an（）
A
cetane number of 55
B
cetane number of 45
C
octane number of 55
D
octane number of 45
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