单项选择题
Before starting any diesel or gasoline engine，which of the following must be checked? （）
A.Oil level B.Flow of cooling water C.Exhaust discharge D.All of the above
单项选择题 All marine low-speed diesels are of what design?（）
单项选择题 All diesel engines are classified as（）.
单项选择题 A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.
