單項選擇題

Before entering an ice area，the ship should be（）.

A.either trimmed by the head or the stern
B.on an even keel
C.trimmed down by the head
D.trimmed down by the stern

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單項選擇題

Any vessel shall，if the circumstances of the case admit，avoid（）in a narrow channel.

A.anchor
B.to anchor
C.anchoring
D.to anchoring

單項選擇題

An alternating light（）.

A.shows a light with varying lengths of the lighted period
B.shows a light that changes color
C.marks an alternate lesser-used channel
D.is used as a replacement for another light

Before entering an ice area，the ship should be（）.

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Any vessel shall，if the circumstances of the case admit，avoid（）in a narrow channel.

An alternating light（）.

Before entering an ice area，the ship should be（）.

Any vessel shall，if the circumstances of the case admit，avoid（）in a narrow channel.