Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?（） A: Splash lubrication B: Pressure lubrication C: Sight feed lubricators D: Mechanical lubricator

Start the turning gear, and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks （）, and with the control gear in the （）position, give the engine at least one complete turn. A: open；“stop” B: closed；“stop” C: open；“start” D: closed；“start&rdquo