单选题Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）AImproper fuel rack positioningBLengthy opening of the exhaust valveCExcessively early injection timingDExtended light load operation
单选题
Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）
A
Improper fuel rack positioning
B
Lengthy opening of the exhaust valve
C
Excessively early injection timing
D
Extended light load operation
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解析：
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