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单选题
Around the combustion chamber, all the main components are bore cooled to give low strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
A
thermal
B
mechanical
C
plastic
D
elastic
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单选题Around the combustion chamber, all the main components are to give low thermal strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）A
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单选题A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.A
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air compressorC
crank caseD
combustion chamber
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单选题The exhaust ports are located around the lower part of the cylinder liner, （）the products of combustion are driven by scavenging air.A
in whichB
by whichC
through whichD
from which
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