When your vessel enters thick fog，she should sound（）every two minutes in accordance with these Rules.<br>A:one short blast<br>B:one prolonged blast<br>C:two short blasts<br>D:three short blasts

When your vessel enters thick fog，she should sound（）every two minutes in accordance with these Rules.
A:one short blast
B:one prolonged blast
C:two short blasts
D:three short blasts

出自：海船船员证

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