单选题The apparent wind can be zero when the true wind is from（）.Aahead and equal to the ship's speedBastern and equal to the ship's speedCahead and equal to twice the ship's speedDastern and equal to twice the ship's speed
单选题
The apparent wind can be zero when the true wind is from（）.
A
ahead and equal to the ship's speed
B
astern and equal to the ship's speed
C
ahead and equal to twice the ship's speed
D
astern and equal to twice the ship's speed
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相关考题：
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