单选题Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）Aclogged air filterBcompression strokeCburned exhaust valvesDall of the above
单选题
Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）
A
clogged air filter
B
compression stroke
C
burned exhaust valves
D
all of the above
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