单选题Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.Aincreasing the volume of intake airBshutting off the fuel supplyCincreasing the engine back pressureDover-speeding the engine
单选题
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
A
increasing the volume of intake air
B
shutting off the fuel supply
C
increasing the engine back pressure
D
over-speeding the engine
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