题目内容

The cylinders and pistons are in the ______ the cylinder block and the crankshaft is in the lower part.

A. left part of
B. upper part of
C. right part of
D. bottom part of

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The ______ ignites the air-fuel mixture,which burns very rapidly to produce gases at high pressure in the cylinder.

A. distributor
B. camshaft
C. spark
D. engine

The cylinder ______ is bolted to the top of the cylinder block.

A. gasket
B. piston
C. cover
D. head

The cylinder head is made of______ alloy

A. copper
B. iron
C. steel
D. aluminum

A ______ is fitted between it and the top of the cylinder head to provide an oil seal.

A. cover
B. piston
C. head
D. gasket