单项选择题
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
单项选择题 Diesel engine air start system check valves are opened by （）
单项选择题 The cetane rating of diesel fuel is an indication of the （）
单项选择题 The condensers located in various stages of a flash evaporator are cooled by（）
