單項(xiàng)選擇題

In regions where ice conditions prevail in the winter，（）.

A.the lantern panes of unattended lights may not become covered with ice or snow
B.the lantern panes of unattended lights may become covered with ice or snow
C.ice or snow is likely caused colored
D.the white lights are likely caused to appear colored

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單項(xiàng)選擇題

A vessel shall not（）.

A.enter the traffic separation zone in an emergency
B.cross a traffic lane
C.engage in fishing in the separation zone
D.proceed in an inappropriate traffic lane

單項(xiàng)選擇題

A sailing vessel shall not impede the safe passage of a（）．

A.power-driven vessel following a traffic lane
B.pilot vessel enroute to a pilot station
C.law enforcement vessel
D.All of the above

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In regions where ice conditions prevail in the winter，（）.

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A vessel shall not（）.

A sailing vessel shall not impede the safe passage of a（）．