单项选择题
A.has kept pace with B.has kept pace to C.has made pace with D.has made pace to
（）the compression ratio, （） the proportion of the heat ...
单项选择题（）the compression ratio, （） the proportion of the heat energy of the combustion turned into useful work at the crankshaft, other things being equal.
A.The high；the large B.The higher；the larger C.The lower；the larger D.The low ；the large
（） the cylinder walls, the heat passes through them by ...
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
The hot expanding gas rotates the blades of the exhaust...
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
