单项选择题
Smaller engines can be made more rigid than large ones and may not have （）.
A.through bolts
B.turbo-chargers
C.bed plates
D.columns
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相关考题
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单项选择题
Smaller engines can be made more rigid than large ones and may not have （）.
A.through bolts
B.dividing walls
C.sloping surfaces
D.relative angles -
单项选择题
Smaller engines can be made more rigid than large ones and may not have （）.
A.connecting rods
B.crankshaft
C.crankcase
D.through bolts -
单项选择题
Since the burning or combustion takes place within the engine itself, the engine is known as （）.
A.a fire -tube boiler
B.an internal combustion engine
C.an external combustion engine
D.an internal combustion generator
