單項(xiàng)選擇題

Shipboard Emergency Drills must be carried out at least（）on board cargo ship.

A.Once every third year
B.Once a month
C.Once a year
D.Once a week

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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