单项选择题
The longer the ignition delay period resulting from improper use of low cetane fuel, the （）
A.less fuel will enter the cylinder
B.higher the cylinder combustion temperature
C.more complete the fuel combustion
D.more rapid the rise in combustion pressure
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单项选择题
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
