单选题When fuel is injected in a diesel engine cylinder too early, （）Aignition may be delayedBfuel economy is not affectedCexhaust gas temperature will be unchangedDthe exhaust will be clear
单选题
When fuel is injected in a diesel engine cylinder too early, （）
A
ignition may be delayed
B
fuel economy is not affected
C
exhaust gas temperature will be unchanged
D
the exhaust will be clear
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