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單項選擇題

（）is a point midway between the forward and the after perpendicular.

A.Length overall
B.After perpendicular
C.Amidships
D.Extreme breadth

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單項選擇題

（）length of the ship measured from extreme points of the ship forward and aft.

A.Length overall
B.After perpendicular
C.Amidships
D.Extreme breadth

單項選擇題

You should always wear（）when working on deck.

A.helmet
B.slippers
C.goggles
D.immersion suits