单项选择题
The cylinder cover is not provided with （）.
A.fuel valve
B.lubricator
C.indicator valve
D.the starting valve
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相关考题
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单项选择题
The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.
A.the beginning of the compression stroke
B.the beginning of the suction stroke
C.the end of the working stroke
D.the end of the exhaust stroke -
单项选择题
The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.
A.repeatedly
B.quickly
C.gradually
D.immediately -
单项选择题
The crown is fairly thick with the cylindrical parts （） to a thinner section.
A.forged
B.tapering
C.drilling
D.boring
