单选题The rate of fuel injection in a diesel engine cylinder depends primarily on （）.Athe size of the holes in the fuel nozzleBtiming of the pumpCsupply pressure to the pumpDshape of the combustion chamber
单选题
The rate of fuel injection in a diesel engine cylinder depends primarily on （）.
A
the size of the holes in the fuel nozzle
B
timing of the pump
C
supply pressure to the pump
D
shape of the combustion chamber
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