单项选择题
The cylinders, with cooling jackets, are （） to the engine frame by eight tie rods.
A.screwed B.welded C.fastened D.rotated
单项选择题 The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.
单项选择题 The cylinder is fitted with internal liner so that a water space is left （） the liner and the outer wall.
单项选择题 The cylinder head, cylinder liner and （） form the combustion chamber.
