In battery charging rooms，ventilation should be provided（）.

单项选择题If passengers are on board when an abandon ship drill is carried out，they should（）.

A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want

单项选择题I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.

A.obliged
B.obliging
C.oblige
D.being obliged

单项选择题I hope you don’t mind（）the radar for us in a short time.

A.repair
B.repaired
C.repairing
D.to repair

单项选择题Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.

A.good getting ground
B.good holding ground
C.good grabbing ground
D.good handling ground

单项选择题Geographic range is the maximum distance at which a light may be seen under（）.

A.existing visibility conditions，limited only by the curvature of the Earth
B.perfect visibility conditions，limited only by the curvature of the Earth
C.existing visibility conditions，limited only by the intensity of the light
D.perfect visibility conditions，limited only by interference from background lighting