单选题（）the compression ratio, （） the proportion of the heat energy of the combustion turned into useful work at the crankshaft, other things being equal.AThe high；the largeBThe higher；the largerCThe lower；the largerDThe low ；the large
单选题
（）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
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