单项选择题
A.top B.middle C.bottom D.any of the above
When a crankshaft has to be handled outside the engine,...
单项选择题When a crankshaft has to be handled outside the engine, it should be carefully supported in a manner which will avoid （） high bending moments on it.
A.compressing B.interposing C.imposing D.pounding
When a crankshaft （） outside the engine, it should be c...
单项选择题When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.
A.has to be handled B.may be handled C.has being handled D.will be handling
Vents are led from the engine to the head tank for the ...
单项选择题Vents are led from the engine to the head tank for the release of （） from the cooling water.
A.air B.heat C.sludge D.steam
