单项选择题
On a rigid liferaft which is equipped with all of the required equipment you may NOT find a（）.
A.boathook B.fishing kit C.lifeline or grab rail D.sea painter
单项选择题 Oil fires are best extinguished by（）.
单项选择题 Multiple fire pumps may be used for other purposes provided that one pump is（）.
单项选择题 Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.
