单项选择题
The use of sinking and dispersing chemical agents for removal of surface oil is（）.
A.the most common method used in the United States B.too expensive for common use C.generally safe to sea life D.authorized only with prior approval of the Federal On-Scene Coordinator
单项选择题 The sprinkler system of an enclosed lifeboat is used to（）.
单项选择题 The sea painter of a rescue boat should be led（）.
单项选择题 The sea anchor shown as item number 14 will NOT（）.
