单选题Cold weather starting of a diesel engine may be made easier by（）Adecreasing the compression ratioBusing a special fuel having a high ignition temperatureCincreasing the starting air supplyDheating the jacket water
单选题
Cold weather starting of a diesel engine may be made easier by（）
A
decreasing the compression ratio
B
using a special fuel having a high ignition temperature
C
increasing the starting air supply
D
heating the jacket water
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