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單項(xiàng)選擇題

The life jackets on all vessels shall be（）.

A.inspected weekly
B.worn at all times
C.readily available
D.tested yearly

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單項(xiàng)選擇題

The last shot of an anchor cable is usually painted（）.

A.white
B.international orange
C.yellow
D.red

單項(xiàng)選擇題

Safety shackles are fitted with（）.

A.a threaded bolt
B.a round pin，with a cotter pin
C.a threaded bolt，locknuts，and cotter pins
D.round pins and locknuts

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