单项选择题
A.notify the duty officer, reduce the engine speed, take some measures to remove failures
B.notify the duty officer and stop the engine immediately, find the cause and remove failures
C.notify the C/E
D.notify the captain
单项选择题 If the main engine starting consecutively failed （） times, it should be found the cause before another starting.
单项选择题 Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except （）
单项选择题 In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）