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31. When the light of a buoy or a lighthouse is inoperative, it should be remarked by in the chart.
(A) “unlit”
(B) “darkness”
(C) “out of order”
(D) “missing”


答案:A
難度: 適中

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 【站僕】摩檸Morning:有沒有達人來解釋一下?
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31. When the light of a buoy or a lighth..-阿摩線上測驗