单选题The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.Athe beginning of the compression strokeBthe beginning of the suction strokeCthe end of the working strokeDthe end of the exhaust stroke
单选题
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
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