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航海英語(yǔ)救生設(shè)備單項(xiàng)選擇題每日一練(2019.01.15)

來(lái)源：考試資料網(wǎng)

1 On a ship，a fixed carbon dioxide or other approved system must be installed（）.

2 On a ship，a cabinet or space containing the controls or valves for the fixed firefighting system must be（）.

3 The boat command that means complete the stroke and level the oars horizontally with the blades trimmed fore and aft is（）.

4 Oily rags stored in a pile that is open to the atmosphere are a hazard because they may（）.

5 On a ship，watertight doors should be operated（）.