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【单选题】
白天受帆船甲看见上风帆船乙顺风驶来,两船相互驶进并构成碰撞危险,根据国际海上避碰规则下面正确的是()。1甲船应保速;2甲船应给乙船让路;3乙船主帆或最大纵帆指向右舷则甲应保速;4乙船主帆或最大纵帆指甲应保速。
A.
①④
B.
②③
C.
③
D.
④
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B.
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C.
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