单选题A diesel engine is equipped with an isochronous hydraulic governorA decrease in load will cause the engine speed to （）Adecrease onlyBincrease onlyCdecrease slightly then returned to original speedDincrease slightly then returned to original speed
单选题
A diesel engine is equipped with an isochronous hydraulic governorA decrease in load will cause the engine speed to （）
A
decrease only
B
increase only
C
decrease slightly then returned to original speed
D
increase slightly then returned to original speed
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