单项选择题
A.tank table B.trim C.water contents D.oil pressure
The four-stroke engine is used for （） and sometimes for...
单项选择题The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.
A.alternator B.turbo-charger C.remote controller D.windlass
The four strokes are called suction, compression, expan...
单项选择题The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.
A.suction B.compression C.expansion D.exhaust
The fine filters will be arranged （） one can be cleaned...
单项选择题The fine filters will be arranged （） one can be cleaned while the other is operating.
A.in order to B.because of C.so that D.so as to
