单项选择题
A.Once every third year B.Once a month C.Once a year D.Once a week
Full details of all lights and fog signals are shown on...
单项选择题Full details of all lights and fog signals are shown on（）.
A.large scale chart B.small scale chart C.ocean chart D.routing chart
What is it called when it is possible to ignite the vap...
单项选择题What is it called when it is possible to ignite the vapour above the oil?（）
A.Flash point B.Boiling point C.Ignition point D.Pour point
Manoeuvring information can not be obtained from（）.A.co...
单项选择题Manoeuvring information can not be obtained from（）.
A.construction plans B.sea trials C.calculation estimates D.SMS procedure file
