单项选择题

（） the cylinder walls, the heat passes through them by conduction.

A.When receiving by
B.When received by
C.In order to receiving
D.In order to receive

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单项选择题

The hot expanding gas rotates the blades of the exhaust turbine, thus （） a large of its power, （） drives the compressor.

A.to give off；which
B.giving off；which
C.to give off；that
D.giving off；that

单项选择题

In the combustion chamber, the part whose surface is exposed to the highest temperature is the （）.

A.cylinder liner
B.cylinder cover
C.piston
D.exhaust valve

单项选择题

As to the bearing, of the following, which statement is not true?（）

A.ff overheat is found, the engine must be stopped for inspection
B.Much heat of the crankcase door indicates that the bearing is overheated
C.If bearing clearance is too large, knocking will be heard in the crankcase
D.If bearing clearance is too large or too small, the white metal may be melted