单项选择题
A.low voltage trip
B.reverse power trip
C.damage to windings
D.excessive exhaust temperatures
单项选择题 One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.
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（）.
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（）.