发动机图一部分，包括曲轴，主连杆总成、凸轮、凸轮转动齿轮、挺杆导套、滚柱、托架等
A.The section of the engine which contains the sleeve, master and link rod assemblies, cams, cam drive gears, tappet guides, carriers, etc. B.The section of the engine which Contains the crankshaft, master and link rod assemblies, cams, cam drive gears, tappet, guides, rollers, carriers, etc. C.The section of the engine which contains the crankshaft, master and manifold assemblies, cams, cam drive gears, tappet, guides, rollers, carriers, etc正确答案C
