单选题When your vessel enters thick fog，she should sound（）every two minutes in accordance with these Rules.Aone short blastBone prolonged blastCtwo short blastsDthree short blasts
单选题
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
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