A . turning gear
B . motor
C . driving gear
D . driven gear
[单选题]The purpose of the flywheel of a diesel engine is to ().A . counterbalance the crank throws on the crankshaftB . keep the engine running smoothly between power strokeC . provide a belt-driving surface for the operation of auxiliary machineryD . preve
[单选题][A] occur[B] engage[C] confront[D] encounter
[单选题]HQ2000型泵车操作面板上的“ENGAGE”的作用是()。A . 挂档B . 空档C . 油门链D . 熄火