单选题In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）Aturn the flywheelBreduce frictionCovercome inertiaDignite the fuel
单选题
In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）
A
turn the flywheel
B
reduce friction
C
overcome inertia
D
ignite the fuel
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