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船舶通訊與航海英文(概要)題庫下載題庫

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9.The required number of dual ___________ nozzles are on board, and each fire hose together with any neseccary fittings and tools kept ready for use in a conspicuous position near water service hydrants or connections.
(A)usage
(B)alternatives
(C)selection
(D)purpose

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10
 【站僕】摩檸Morning：有沒有達人來解釋一下?
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9.The required number of dual __________..-阿摩線上測驗