单选题“The engine not obtaining the sufficient speed for firing” means that （）.Athe start failsBthe fuel pumps will be put into operationCthe fuel valves are damagedDthe combustion process will take over
单选题
“The engine not obtaining the sufficient speed for firing” means that （）.
A
the start fails
B
the fuel pumps will be put into operation
C
the fuel valves are damaged
D
the combustion process will take over
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