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單項選擇題

（）is used in bilges and peak tanks.

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

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單項選擇題

Why are （）easy to be rusted?

A.ropes
B.gloves
C.ships
D.drafts

單項選擇題

Everything on the bridge should be kept （）.

A.dirty
B.bad
C.clean
D.disorder

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