单项选择题
On a vessel with a single propeller，transverse force has the most effect on the vessel when the engine is put（）.
A.full ahead B.full astern C.half ahead D.slow astern
单项选择题 On a twin-screw，twin-rudder vessel，the most effective way to turn in your own water，with no way on，is to put（）.
单项选择题 On a single-screw vessel the stern frame（）.
单项选择题 On a ship，the possibility of a blowout makes which type of diesel engine shutdown desirable?（）
