航海英語(yǔ)緊急用語(yǔ)單項(xiàng)選擇題每日一練(2019.01.21)

來(lái)源：考試資料網(wǎng)

1 The radiotelephone message that indicates a station is about to transmit a message concerning the safety of navigation or important meteorological warnings commences with（）.

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2 Which one of the following is the safety signal?（）.

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3 Five or more short blasts on a vessel’s whistle indicates that she is（）.

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4 There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.

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5 To prevent a wooden hull from leaking you caulk it（）.

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