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单项选择题
A.thrust block
B.sounding rod
C.connecting rod
D.push rod
单项选择题
A.a cooling system
B.a lubrication oil system
C.an electric system
D.an injection system
单项选择题
A.lower than;can lubricate
B.lower than;can cool
C.higher than;can enter
D.higher than ;cannot enter
单项选择题
A.the cylinder cover
B.the piston rings
C.the piston crown
D.the piston skirt
单项选择题
A.whatever
B.whenever
C.wherever
D.whoever
单项选择题
A.scavenging
B.starting
C.cooling
D.blowing
单项选择题
A.make use of
B.have made the use of
C.by means of
D.make advantage of
单项选择题
A.are made of
B.are made from
C.make use of
D.are used to
单项选择题
A.the clearance of the main bearing
B.the diameter of main bearing
C.the hardness of main bearing
D.the tolerance of main bearing