单选题The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）Aexpansion of the combustion gasesBexhaust and intake valves just closingCmaximum compression is just being attainedDfuel injection occurring at that point and combustion begins
单选题
The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）
A
expansion of the combustion gases
B
exhaust and intake valves just closing
C
maximum compression is just being attained
D
fuel injection occurring at that point and combustion begins
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