单项选择题
Releasing oil from the sea anchor of a lifeboat may（）.
A.keep the propeller from being fouled B.increase propeller speed C.help calm the waves in the vicinity of the craft D.increase the holding power of the sea anchor
单项选择题 On a vessel，if someone fell overboard and you did not know over which side the person fell，you should（）.
单项选择题 On a ship，a fire pump may be used for other purposes if（）.
单项选择题 On a rigid liferaft which is equipped with all of the required equipment you may NOT find a（）.
