单项选择题
A. They work four hours and have four hours for rest. B. They work eight hours and have four hours for rest. C. They work four hours and have eight hours for rest. D. They work eight hours and have eight hours for rest.
驾驶台始终有驾驶员值班。（）A. Sailors are always on watch on the bri...
单项选择题驾驶台始终有驾驶员值班。（）
A. Sailors are always on watch on the bridge. B. Deck officers are always on watch on the bridge. C. Sailors are never on watch on the bridge. D. Deck officers are never on watch on the bridge.
后退一！（）A. Full ahead!B. Slow astern!C. Half astern!D. De...
单项选择题后退一！（）
A. Full ahead! B. Slow astern! C. Half astern! D. Dead astern!
后退二！（）A. Full ahead!B. Slow astern!C. Half astern!D. Ah...
单项选择题后退二！（）
A. Full ahead! B. Slow astern! C. Half astern! D. Ahead three!
