In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）<br>A:fuel must be preheated<br>B:intake air should be preheated<br>C:lube oil outlet temperature should be increased 20℃ above normal<br>D:none of the above

In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）
A:fuel must be preheated
B:intake air should be preheated
C:lube oil outlet temperature should be increased 20℃ above normal
D:none of the above

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