Which of the following statements is true concerning the cetane number rating of diesel fuel? （）<br>A:The cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbon<br>B:The higher the cetane number, the shorter the ignition lag<br>C:The highest cetane number of fuel is 100<br>D:All of the above

Which of the following statements is true concerning the cetane number rating of diesel fuel? （）
A:The cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbon
B:The higher the cetane number, the shorter the ignition lag
C:The highest cetane number of fuel is 100
D:All of the above

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