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（）<br>A:cetane number of 55<br>B:cetane number of 45<br>C:octane number of 55<br>D:octane number of 45

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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