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單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

Smaller engines can be made more rigid than large ones and may not have （）.

A.connecting rods
B.crankshaft
C.crankcase
D.through bolts

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