单项选择题
In a diesel engine, excessive cylinder liner wear will cause （） (1) increased blow-by (2) wear between the piston ring and groove
A.(1) only is correct B.(2) only is correct C.both (1) and (2) are correct D.neither (1) or (2) axe correct
单项选择题 Engine displacement is equal to the cylinder （）.
单项选择题 Auxiliary boilers are divided into several classifications, one of which is （）.
单项选择题 Load control on a diesel engine is accomplished by （）.
