单项选择题
A carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.
A.tagged and restowed properly in its rack B.weighed and the charge loss recorded C.given to the chief engineer for recharging D.tagged "empty" and stowed separately from charged extinguishers
单项选择题 Which of the listed fire extinguishers cannot be easily recharged aboard ship?（）
单项选择题 When checking the liquid level in a tank, you should position yourself （）.
单项选择题 The stability of a vessel is normally the greatest when all fuel and water tanks are full because the （）.
