单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）Aa leaking fuel injection nozzleBa clogged air filterCearly fuel injectionDburned valves
单选题
A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A
a leaking fuel injection nozzle
B
a clogged air filter
C
early fuel injection
D
burned valves
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