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A sailing vessel is overtaking a power-driven vessel in a narrow channel，so as to pass on the power-driven vessel’s port side. The overtaken vessel will have to move to facilitate passage. The sailing vessel is the（）.
A:stand-on vessel and would sound two short blasts
B:give-way vessel and would sound no whistle signal
C:stand-on vessel and would sound no whistle signal
D:give-way vessel and would sound two prolonged blasts followed by two short blasts

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出自：海船船员证

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