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航海英語(yǔ)各種英文申請(qǐng)書單項(xiàng)選擇題每日一練(2019.01.22)

來(lái)源：考試資料網(wǎng)

1 Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.

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2 It is not necessary to declare（）in MARITIME HEALTH DECLARATION.

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3 Permanent magnetism is caused by（）.

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4 A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.

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5 An inert gas system installed on a tanker is designed to（）.

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