单选题（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.AThe driven gearBThe driveCThe greaseDThe lubricating oil
单选题
（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.
A
The driven gear
B
The drive
C
The grease
D
The lubricating oil
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