单项选择题
If your propeller is racing in rough weather，you should（）.
A.decrease your engine speed B.ignore it C.increase your engine speed D.stop your engine until the rough weather passes
单项选择题 If you are unable to stop a diesel engine by any other means，you should（）.
单项选择题 If ignited，which material would be a class B fire?（）
单项选择题 If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur?（）
