單項(xiàng)選擇題

Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）

A.Greenish
B.Bluish
C.Grey
D.Grey-white

你可能感興趣的試題

單項(xiàng)選擇題

In order to benefit from the use of storm oil in heavy seas，the storm oil should be spread （）.

A.around the rudder and screws
B.completely around the vessel
C.to leeward of the vessel
D.to windward of the vessel

單項(xiàng)選擇題

If your vessel has a GM of one foot and a breadth of 50 feet，what will be your full rolling period? （）

A.11 seconds
B.15 seconds
C.20 seconds
D.22 seconds