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單項(xiàng)選擇題

Primer coats are applied to a bare metal surface to give protection against （）.

A.rust
B.dirt
C.dust
D.air

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單項(xiàng)選擇題

（）is used in bilges and peak tanks.

A.Bitumen
B.Paint
C.Cement wash
D.Varnish

單項(xiàng)選擇題

（）is the eye of the ship.

A.Engine room
B.Bridge
C.Deck
D.Compass

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