航海英語求生用語單項(xiàng)選擇題每日一練(2019.01.14)

來源：考試資料網(wǎng)

1 Seawater may be used for drinking（）.

2 The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.

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3 If help has not arrived in 10-12 hours after you abandon a vessel in a survival craft，you should（）.

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4 Once you have established the daily ration of drinking water in a survival situation，how should you drink it?（）

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5 The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.

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