单项选择题
In the starting system, the automatic valve is controlled by（）, and the cylinder start valves are controlled by（）
A.pilot air；pilot air B.handle；solenoid C.handle；pilot air coming through the distributor D.solenoid；pilot air coming through the distributor
单项选择题 A marine diesel engine is started by（）
单项选择题 In modern installations, the main engine and the standby auxiliary engines（）
单项选择题 In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed（）
