单项选择题
The pilot needs the ship to go forward very slowly. The order should be （）.
A. “Slow ahead”
B. “Dead slow ahead”
C. “Astern”
D. “Dead slow astern”
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单项选择题
A. “Slow ahead”
B. “Dead slow ahead”
C. “Astern”
D. “Dead slow astern”
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