Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather con

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Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by _______

A.increasing the quantity of starting air

B.increasing the lube oil pressure

C.heating the engine fuel supply

D.heating the engine coolant

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗