单项选择题
Vee-type engines have the connecting rods from two cylinders connected to each （） of the crankshaft.
A.throw B.web C.main bearing D.deflection
单项选择题 Valve overlap is the period during which （）.
单项选择题 Valve gear knocks are more easily located while the engine （）.
单项选择题 VIT means （）
